Answers

Q: What are your thoughts on topical finasteride? I am hesitant to use this because I cannot find any good studies on this let alone what the potential side effects may be with prolonged use.

A: Although there are no controlled studies to date, our sense is that topical finasteride in the right formulation may be a good therapeutic option. Long-term it should be at least as safe as the oral formulation.

However, presently, we don’t use topical finasteride for the following reasons:

1. The dosing and efficacy have not been worked out.
2. The topical formulations are not regulated and therefore not consistent in dose.
3. In order to be effective, topical finasteride must be absorbed to some extent in the bloodstream and so a similar side effect profile may exist as with the oral version.
4. It is not clear that using it topically can increase the efficacy/side effect ratio (i.e., depression of serum DHT levels may be important for its effect).
5. It may inadvertently be used by pregnant women.

Q: How do you best manage the irritation that comes with minoxidil? I have patients that report burning, and this causes them to stop treatment prematurely.

A: We start with minoxidil solution and if the patient gets irritated, switch to the foam (which doesn’t have the propylene glycol that is contained in the solution).

If he/she can’t tolerate the foam, then we consider oral minoxidil. We rarely use a topical steroid in conjunction with the minoxidil (a practice of many doctors).

As an aside, once a day use is all that is necessary and this seems to be less irritating than bid.

Q: What is your opinion of the companies that advertise hair loss solutions like Hims and Keeps?

In searching the web and riding the subway I’ve seen many ads for a company called Hims that offers hair loss medicine and other medical solutions for men’s problems. What are the medications used for hair loss and how do they compare to Propecia and Rogaine? — V.T., Long Island, NY

A: Hims and Keeps are digital wellness companies that are geared toward men. They prescribe the same hair loss products that you can receive from a doctor or from online stores like Amazon, such as minoxidil, finasteride, biotin, salicylic acid shampoos and other topical and oral medications. The patents on the most commonly used prescription medications have expired within the last few years, opening the door for companies to distribute their own generic versions. The online system that Hims uses allows people to get prescriptions without seeing a doctor. Although this might be convenient, receiving an in-person evaluation from an experienced physician is important to ensure that you receive the proper treatment. Medical treatments for hair loss are most effective when started early. Therefore, making sure the diagnosis is correct and that the medications are optimized, will give you the best chance of re-growing your hair and preventing future thinning.

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Q: Can Rogaine Cause Miniaturization?

When I am on Rogaine it seems – to my untrained eye – that I am having hair miniaturization and when I stopped briefly, I had shedding. Does this seem accurate based on what you have seen? Can Rogaine cause miniaturization? Is there a point you would recommend I stop Rogaine or is it something that likely can’t cause a negative impact on hair? — B.T., Brooklyn, NY

A: Minoxidil reverses miniaturization. It does not cause it. Shedding can occur after starting use of Rogaine but this means the medication is working should resolve with continued use. New miniaturized hairs are either from the progression of your genetic male pattern hair loss or newly forming hair that was stimulated by the minoxidil which can mimic miniaturized hair.

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• Read our Rogaine Tips

Q: What is more important against baldness, decreasing DHT in serum with oral finasteride or decreasing DHT in the scalp with topical finasteride? — A.G. ~ Brooklyn, N.Y.

A: Decreasing serum DHT with oral finasteride is more effective in combating hair loss, as the decreased blood levels also lowers the DHT in follicles and seem to do it better than finasteride applied topically.

Q: Dr. Bernstein, I am experiencing side effects on Propecia, are there alternative treatments? — J.D. ~ Roslyn, N.Y.

A: Yes, minoxidil (Rogaine), low level laser therapy (LLLT). Unfortunately, none of these will be as effective as finasteride.

Q: What do I do if I start experiencing side effects on finasteride? — L.L. ~ Riverdale, N.Y.

A: Don’t panic, just stop the medication and let your doctor know. He or she will give you guidance based on your symptoms.

• Read more about Propecia (finasteride) and side effects

Q: I had a good friend get a transplant at your practice and it seems that your practice is the industry leader in hair transplantation. I may one day be looking for one. That being said, my friend said I shouldn’t trust anyone else. I wanted to know if you may be able to tell me what tests/specific labs you have your patients do prior to starting Propecia. I am having my doctor put me on it but he does not recommend any labs but I don’t trust this. So I’m not looking for medical advice, just what your practice may advise a patient to get (in terms of labs/blood tests) prior to starting Propecia. I’m really hoping you can help as I have already contacted a number of other sources and can’t seem to get an answer. — M.B. ~ Upper East Side, N.Y.

A: Blood tests are not required before starting finasteride and we do not routinely perform them. If a patient requests test then Total and Free Testosterone, DHT, and Prolactin are reasonable to obtain, but there is no consensus on what the appropriate tests might be. If a patient requests tests because he has symptoms (i.e. such as lack of energy associated with low T), he should see his internist, urologist, or GP. That said, patients 50 and over (40 and over in patients with a high risk of developing prostate cancer) should have a PSA before starting finasteride.

• Read more about Propecia (Finasteride)

Q: Does a man’s height and weight affect the dose of finasteride or Propecia he should take? i.e. will a 6’4″ man need a higher dose than a 5’7″ man. — T.B., Rye Brook, NY

A: The dose of finasteride is the same (i.e. 1mg) regardless of a person’s height or weight. The reason is that one needs only 0.5mg a day for it to be effective, so there is much leeway built into the dose (but the rate of non-responders is slightly higher at the 0.5mg/day dose). That said, after 5 years or so, finasteride seems to be less effective and doctors often increase the dose a bit. The next step-up is generally to take 1/3 of a 5mg pill each day. Keep in mind that the dosing we are speaking about is for hair loss (androgenetic alopecia). When finasteride is used for prostate enlargement, the dose is 5mg a day.

Q: Hi. I am 52 years old and wish to know if Propecia will work for people my age. I have started losing some hair a couple of years ago and it’s thinning out. Thank you very much for your help. — K.E., Boca Raton, FL

A: Propecia (Finasteride 1 mg) can hold on to hair at any age, but works best to re-grow hair in those who are younger.

The reason is that finasteride works to reverse miniaturization (the thinning and shortening of hairs due to DHT). Younger patients, with early hair loss, generally have more hair in the early stages of miniaturization where the changes are readily reversible.

Older patients are more likely have more advanced miniaturization or areas that are totally bald and will thus not regrow with medical therapy.

• Read more about Propecia

Q: Can Propecia (finasteride) completely halt androgenic alopecia for the duration of your lifetime, or does it just slow down the progression of androgenic alopecia? — L.B., Scarsdale, N.Y.

A: In many patients we have found finasteride to hold on to a patient’s hair for at least 15 years. We don’t have much longer data than that since it was approved for hair loss in 1998. Although finasteride will usually continue to work as long as you take it, it may lose some of its efficacy over time. Generally after about 5 years we may notice that the patient’s hair is starting to thin again and we will increase the dose slightly. It is important to understand that even if someone thins on finasteride it doesn’t mean the medicine is not working, because they might have thinned much more without it. To my knowledge, there are no studies that have looked at the effects of finasteride for such an extended period of time.

• Read about the first comprehensive study to investigate Propecia’s long term efficacy
• Read more about Propecia (finasteride)

Q: I’ve heard that using Propecia and/or Rogaine is a good idea after having a hair transplant, but are they mandatory? — B.M., Short Hill, N.J.

A: Neither finasteride (brand name: Propecia) nor minoxidil (brand name: Rogaine) will have any effect on transplanted hair. That said, while you don’t need them to protect your transplanted hair, you will likely have original hair interspersed among your transplanted hair that will continue to thin and fall out over time. This vulnerable hair can be protected by finasteride which has been shown to reduce future hair loss significantly; additionally, you can add Rogaine for extra benefit.

However, with Propecia, you should only use it if you can commit to it long-term because it takes up to a full year to see any effect. With Rogaine, you should only use it if you can commit to using it continually and regularly – you should not stop and start it.

Q: I have done a lot of research over the past year including seeing a dermatologist and receiving consultation from a surgeon. Both recommended Propecia and Rogaine. After my consults I researched these products online and read that they do not work on the front of the scalp to improve my receding hairline, only to regrow hair in the crown area. Can you settle the issue once and for all? Do Propecia and Rogaine work on the front of the scalp? Can they improve my receding hairline? — J.S., Great Falls, Virginia

A: Both Propecia and Minoxidil definitely can work in the front of the scalp as long as there is some hair in the area. Although their mechanisms of action are different, both Propecia (finasteride) and Rogaine (minoxidil) act to thicken miniaturized hair regardless of where it is on the scalp. In fact, there are published data ((Leyden, James et al. “Finasteride in the treatment of men with frontal male pattern hair loss.” J Am Acad Dermatol. 1999 Jun;40(6 Pt 1):930-7.)) demonstrating this improvement with finasteride in a controlled clinical trial of men with frontal hair loss.

The source of the confusion is that the FDA limited the application of the drugs to the crown on the package inserts for both Propecia and Rogaine. The FDA did this because Upjohn (the company that introduced Rogaine) and Merck (Propecia) only tested the medications on the crown in the clinical trials. Logically, the fact that DHT causes frontal hair loss and Propecia works by blocking DHT gives a reasonable explanation for the efficacy of the drug on the front of the scalp. Also, a side effect of the use of minoxidil is facial hair, so how could it not also work on the front of the scalp? It is regrettable that some doctors and many patients think that these medications won’t work on the front of the scalp. Unfortunately, many hair restoration surgeons have done little to educate the public and dispel this myth.

To reiterate, yes, both of these medications can work on the front of the scalp to prevent hair loss and thicken a thinning hairline. However, it is important to note that neither of these medications can grow hair on a totally bald scalp or lower an existing hairline. Hair follicles must exist for the medications to work. It is also important to stress that the best results come from using both finasteride and minoxidil together.

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• Before & After Photos of hair loss treatment with Propecia and/or Rogaine
• Tips on Using Rogaine (Minoxidil)
• Tips on Using Propecia (Finasteride)

Q: I’ve heard that FDA added a description of reports of male infertility to the side effect labels of both Propecia and Proscar (finasteride). Is this a likely side effect in your experience? — S.S., Rolling Hills, California

A: Propecia (finasteride 1mg) may lead to male infertility not only by changing the consistency of the male ejaculate but by decreasing the sperm count as well, but this is uncommon.

Ejaculate is a combination of sperm produced by the testes and a viscous fluid made by the prostate. Since finasteride shrinks the prostate, it can make the ejaculate less viscous (more watery).

Most patients trying to conceive will have no issues while taking Propecia.

If one is having difficulty trying to conceive for 4-6 months, then it is reasonable to stop taking Propecia.

It is important to know that taking Propecia while trying to conceive will not lead to congenital deformities or issues with the fetus as long as the woman does not come in direct contact with the medication.

Q: I have been using an increased dosage of Propecia now for around 8 months and Rogaine for about 6 months. I know that shedding can be expected for the first 3-6 months, but I believe I am now beyond that timeframe. Have you seen cases in which these products merely exacerbate hair loss without the expected regrowth? — N.E., Travilah, Maryland

A: It is a bit long to still see shedding, but from my experience, either the medications are working (and you are still in the shedding phase) or you are not responding to them. I have not seen minoxidil or finasteride worsen hair loss. My advice would be to continue the same course for at least a year before re-evaluating their use.

Q: I read your 20 pages of FAQs but could not find this question addressed. I’m currently taking Finasteride 5 mg (one-fourth tablet per day), but since some drug companies make an oblong tablet that is hard to cut into four pieces, I found a plastic bottle with four equal measurements and I dissolve the tablet in water, shake it up and drink one-fourth of the liquid each day. I read somewhere that you’re not really supposed to dissolve the pill in water. Is that correct or is it OK to keep doing it the way I’m doing? — W.I., Winnetka, Illinois

A: I would cut up the pills with a pill-cutter – they do not need to be in equal parts. Just finish a whole pill every four days. You can also take ½ pill every other day and achieve the same effect. I am not sure of the stability of the medication in water over several days. It is probably OK, but why take the chance?

Q: As a Propecia user, I was alarmed when I read headlines last year about a new study indicating very high rates of depression and erectile dysfunction caused by Propecia, with symptoms persisting even after the drug was stopped. However, when I read the articles, this “study” appeared to be survey of 61 men who had taken Propecia and already reported sexual problems who were then asked about symptoms of depression. These rates of depression were compared to a small survey of men who had hair loss but had never taken Propecia.

Anyone with a basic understanding of statistics would know such a survey was deeply flawed. First, it is a textbook example of a bad data sample — to get sound results you have to start with an unbiased and random group of people who took the drug, not a self-selected group of men already suffering symptoms. The study also confuses correlation with causation — because these men are suffering from ED or depression does not necessarily mean it was caused by the drug. Am I missing something here, or did the media just report these “findings” with no scrutiny on what was actually studied? — Jonathan, Brooklyn, NY

A: Jonathan, I think you’re right on the mark. The way the study was conducted raises a lot of concern about the accuracy of the findings. It is really important that additional data is obtained in a controlled way, as this will be most useful for physicians in advising patients. I addressed concern on these reports last year. The issue of persistent sexual dysfunction as a side-effect of finasteride (Post-Finasteride Syndrome) is an on-going issue that we take very seriously. I sit on the International Society of Hair Restoration Surgery (ISHRS) Task Force on Finasteride Adverse Events, so this is an issue that we watch very closely.

• Read more about Propecia and Persistent Side Effects
• Read more about Propecia (finasteride)

Q: After achieving results with 5% Minoxidil is it possible to the switch to the 2% version to maintain those results without any adverse hair loss? — I.I., Winnetka, Illinois

A: It will be less effective. The dosing should not be decreased.

• Read more about Rogaine (minoxidil)

Q: Have you any experience with Azelaic Acid as a hair loss treatment — is this something you would recommend using with Rogaine (minoxidil) 2% or 5% solutions? — S.V., Short Hills, N.J.

A: Azeleic acid has no direct benefit in promoting hair growth. Azelaic acid (like retinoic acid) increases the absorption of minoxidil, but also the side effects, so I would especially not recommend it in your case.

Read more about Rogaine (minoxidil)

Q: Is it possible that side effects attributed to the use of Minoxidil 5% lotion can reduce over time or disappear altogether? Specifically I experienced a heightened sense of heart activity (palpitations). — D.D., Bronxville, NY

A: Yes, the side effects may diminish over time.

Q: I have heard that side effects from finasteride can persist even after stopping the medication. What is the most current information on this issue? — S.V., Short Hills, N.J.

A: For the past two years I have been on the International Society for Hair Restoration Surgery (ISHRS) Task Force on Finasteride Adverse Events and struggling to make sense of this issue. There seems to be a disconnect between the relatively low incidence of side effects that we, as physicians, see in our practices, what published controlled studies have shown, and what is now being reported on the internet and in some instances in the media. For example, a 2012 study by Sato of 3,177 Japanese men published the Journal of Dermatology, showed a 0.7% incidence of adverse reactions to finasteride 1mg and no persistent side effects after stopping the medication.

That said, there has been a recent increase in anecdotal reports of side effects from finasteride as well as reports of persistent side effects after the medication has been discontinued (referred to as “Post-finasteride Syndrome”).

The FDA

Based on post-marketing reports of sexual dysfunction, in April 2012, the FDA announced changes to Propecia (finasteride 1 mg) labeling to expand the list of sexual adverse events and that some of these events had been reported to continue after the drug is no longer being used. It is important to note that no new clinical studies were reviewed to evaluate these adverse events and that the FDA is not aware of any additional controlled clinical studies conducted to evaluate these adverse events or to determine their cause or duration. (see FDA Label Changes for Finasteride 2012)

The FDA states that despite the fact that clear causal links between finasteride (Propecia and Proscar) and sexual adverse events have NOT been established, the cases suggest a broader range of adverse effects than previously reported in patients taking these drugs. The FDA states that it believes that finasteride remains a safe and effective drug for its approved indications, but also advises that healthcare professionals and patients should consider this new label information when deciding the best treatment option.

The difficulty with interpreting anecdotal information is significant. The following need to be considered; first, sexual dysfunction, both temporary and persistent, is quite common in the general population and patients may have new-onset sexual dysfunction from some other, unrelated, cause and second, patients may have real (physiologic) side effects from the medication and then have psychological after effects. It is so difficult to sort these factors out.

The ISHRS

The Finasteride Symposium at the 2012 ISHRS, of which I was a panelist, explored safety issues with finasteride. Dr. Akio Sato presented his data (quoted above) suggesting that finasteride side effects are uncommon and that persistent side effects were not seen. Dr. Freedland, a urologist and featured guest speaker at the ISHRS symposium, questioned whether long-term effects of a slight elevation in estrogen levels could have adverse effects on the prostate. The panel discussed the paper of Dr. Michael Irwig at George Washington University that appeared in The Journal of Sexual Medicine this year. In his survey of 54 patients of men who had persistent sexual side effects three or more months after the discontinuation of finasteride, he reported that sexual dysfunction continued for many months or years in the majority of the patients.

Difficulties in interpreting this study are that it assumed that the patient’s sexual dysfunction were caused by finasteride when, in fact, there is no way of knowing that finasteride was the actual cause of the side effects (this would need a blinded, placebo-controlled study). A second reason that makes interpretation difficult is that, because there was selection bias in the Irwig survey, there is no way of knowing if these patients are representative of the population of men on finasteride. That said, the data presented by Dr. Irwig stresses the importance of having more clarity on the potential side effects of finasteride, since it is so widely prescribed.

It was clear from the presentations and questions asked, that many issues are still unresolved. All in attendance agreed that further research is urgently needed. In the short term, it is most important that all patients who are having problems can have easy access to doctors with expertise in this area, so that they can be diagnosed properly and treated.

Q: I have been taking finasteride for several years and I seem to be doing well. Does finasteride generally work long-term? — A.C., West University Place, Texas

A: With regard to efficacy, a recent long-term, uncontrolled study by Rossi et al. reported that the beneficial effects of finasteride on hair growth continued as time goes on and that a significant proportion of patients, unchanged after 1 year, improved later on. In addition these patients maintained a positive trend over time -– up to ten years. When comparing different age groups, they found that subjects older than 30 years showed a better hair growth in the long term than those who were younger. Of the 113 patients in the study followed for 10 years, only 14% worsened, whereas the remaining 86% had benefits.

Read more details about the Rossi study

Q: Dr. Bernstein, I am an attending at Mass General Hospital in Boston and would like to ask you regarding your experiences using finasteride for male androgenetic alopecia. While I have not noticed any side effects in the patients that I have been treating, I increasingly get questions regarding side effects based on the recent media attention to reports of potentially permanent problems regarding libido or erectile dysfunction. I know that in the literature there is a slight increase of reversible sexual dysfunction (~4% vs. ~2% in placebo) with Propecia, and no convincing evidence to date in the medical literature that have used controlled studies regarding permanent problems even after discontinuing Propecia. — S.Z., Boston, Massachusetts

A: That is correct.

Q: I know that you have treated many patients over a long period of time, and I was thus wondering what your take is on potentially permanent sexual dysfunction after taking finasteride. Have you seen any convincing reports/patients or do you have any concerns regarding irreversible side effects?

A: I have seen 5 cases in over 10,000 patients on finasteride that complained of this but, of course, there is no way to know for sure if there is a cause and effect relationship. As you know, real side effects may be followed by psychological ones and if the sexual dysfunction has another cause, then stopping finasteride would have no effect on the symptoms. The incidence of intermittent or persistent sexual dysfunction in the general population of men is about 30%, so one would expect these numbers to be much higher just due to the normal incidence. It is really a difficult situation to understand. The experience that my colleagues and I have in our practices is much different than one would expect after reading the numerous anecdotal reports on the internet.

Q: Would you think it is safe to say that any potential sexual dysfunction is reversible after discontinuing the use of finasteride?

A: I don’t think that anyone knows at this point. The FDA is coming down on the side of caution and saying that it is possible, although it is not based on any new studies. If the phenomenon is real, the possible mechanism is not yet known.

Q: In the relatively few patients that I have treated with Propecia, they did not even report temporary problems regarding libido or erectile dysfunction. Do you think they are real or rather attributed to Propecia simply because the patient is made aware of these potential side effects?

A: I think that psychological effects may account for many cases. At this time, it is still not clear if a physiologic “post-finasteride syndrome” is real. A lot more work needs to be done before we have a definitive answer to this question.

Q: I recently visited my dermatologist regarding my hair loss, and after checking my hair he said I am showing signs of Androgenetic Alopecia (common baldness), and said if I don’t treat it, it will progress. From my research on the net, I figured he will put me on Propecia. In fact he put me on Avodart. When I told him it is not FDA-approved for hair loss, and Propecia is, he said Avodart is better and brings DHT down more, and Propecia is nothing next to Avodart. He told me to take it every day for 2 weeks, then every other day from then on as it has a long half life. From researching on the net, many hair restoration doctors rarely prescribe Avodart for hair loss due to some dangers. What is your opinion on this? — T.G., Darien, Connecticut

A: Although dutasteride (Avodart) can be more effective for male pattern hair loss, I would start with finasteride (Propecia) as many patients do great with it and the safety profile is better. The following are things I would consider before starting dutasteride:

1. As you point out, dutasteride is not FDA-approved for hair loss.
2. There is no data on its safety when used for hair loss. This is important since dutasteride has been only tested on an older population of patients (with prostate disease) rather than a younger population of patients needing medical treatment for androgenetic alopecia.
3. These is no natural model for dutasteride’s combined blockage of both type 1 and 2 5-alpha reductase (finasteride blocks only type 2 5-AR and there are families that have this deficiency and have no long-term problems. This, by the way, is how the drug was discovered).
4. The type 1 enzyme which dutasteride blocks is present in many more tissues of the body (including the brain) compared to type 2 (which is more localized to the skin).
5. Although so far unproven, there is a concern that finasteride may produce side effects than can be persistent after stopping the medication (post-finasteride syndrome). It this does turn out to be true, the effects from dutasteride would most likely be significantly more persistent.
6. If you start with finasteride and do have side effects, you will most surely have side effects from dutasteride; therefore, by taking finasteride first you will have avoided the potentially more problematic side effects from dutasteride
7. You may respond well to finasteride, and so do not need to consider dutasteride

• Read about Propecia (finasteride)
• Read about Avodart (dutasteride)
• View before and after photos of medical treatment of hair loss

Q: I have been finasteride for several years. My wife and I are currently trying to conceive our first child and it is unclear to me if it is safe to continue taking finasteride during this period. Unfortunately, I have not been able to get a clear position via the Internet. Most people commenting on it are on blogs and the response goes both ways — some say it’s ok, others say stop. While I know that it’s imperative that a pregnant woman not touch the medicine, can you please let me know if I can continue taking the medicine while trying to conceive? — M.K., Edgeworth, PA

A: It is OK for you to continue finasteride while your wife is trying to conceive. However, there is some data to suggest that it may slightly decrease fertility since, by shrinking the prostate (the prostate produces 25-30% of semen volume) it slightly changes the overall composition of semen. These effects appear to be temporary and finasteride has no direct effect on sperm. If you and your wife were to have difficulty conceiving, at that point is might be reasonable to temporarily discontinue the medication.

Q: Doctor Bernstein, I was looking at your website and saw the photos of medical hair loss treatments only, with Rogaine and Propecia. Doctor, are all those pictures just with medical treatments or is there concealers as well? I don’t mean to sound rude or disrespectful, but are the pics all real and genuine? Those are some impressive responses to medical treatment. — A.D., Scarsdale, NY

A: The photos are un-retouched and without concealers. These are responses to medical treatment alone. Yes, medications (finasteride and minoxidil) can work really well in select patients. Patients with early stages of thinning usually respond the best. Contrary to popular belief, the medications can work in the front part of the scalp, as long as the area is not shiny bald.

Perhaps about 1/3 of patients respond well enough to be put on the site. Most others have a good response, but not necessarily improvement significant enough to be easily noticeable in photos.

Q: Are the “result” photos from taking Propecia and using Rogaine legitimate? Some of the after photos look too good to be real and a few patients looked like they combed their hair to look like they had more coverage. — T.Y., Darien, Connecticut

A: The before and after photos of patients using Propecia and Rogaine are my patients. All photos on our website are un-retouched. When patients have a good response to medical therapy, they often have more flexibility in how they can groom and style their hair. This is reflected in the photos.

Q: You prescribed Propecia for my hair loss. I was wondering if the news report on Propecia side effects has altered your opinion regarding the safety of this drug? — N.D., Belle Meade, Tennessee

A: It has not changed. I believe you are referring to Dr. Michael Irwig’s study at George Washington University published in the Journal of Sexual Medicine. I was already aware of the study when I prescribed the medication for you and we discussed the risk of persistent side effects at your consult.

Although all types of data should be considered, it is important to realize that this was not a scientific study, but a survey. It had very significant selection bias. From this type of study, one can’t prove cause and effect relationships or even get a sense of actual incidences. These were patients who were recruited because they already had persistent sexual dysfunction. Since it is not clear if their persistent problems were directly due to the medication or from other factors, and since these patients were selected, rather than randomly assigned, the additional information can be gained from the report is very limited.

That said, the reporting of persistent side effects should not be taken lightly, but should be viewed in the context of all available data. It is extremely important for us to continue to be vigilant, as this is a very significant issue, but it is equally important not to make decisions on data sensationalized in the media. As a result of the finasteride data, some are presenting surgery as a more reasonable alternative than medication. For a young person, that is usually not the case.

Q: I am 27 years old and I have been on Propecia for 12 months now. Honestly, I have seen no response from it. In my dermatologist’s opinion I am a non-responder. I asked about Avodart and he said, since Propecia didn’t help then Avodart won’t help as well since both are DHT blockers, and if one didn’t work the other won’t either. In your opinion do you think Avodart is better? I have read that it blocks more DHT than Propecia. What is the dosing for Avodart? If someone does not respond to Propecia will they also not respond to Avodart? — A.C., West University Place, Texas

A: Avodart (dutasteride) is more effective than Propecia (finasteride) and some patients will respond to dutasteride who do not respond to finasteride. Dutasteride decreases serum DHT about 90% compared to 70% for finasteride. The usual starting dose of Avodart is 0.5mg a day.

That said, dutasteride is not FDA approved for use in hair loss and if a person has sexual side effects, the side effects are more likely to be persistent after stopping the medication compared to finasteride.

Read more about Avodart (dutasteride)

Read more about Propecia (finasteride)

Q: Is taking Propecia absolutely essential to retain the transplanted hair after a hair transplant? — D.W., Toronto, Canada

A: Propecia (Finasteride 1mg) does not affect transplanted hair. The purpose of taking finasteride is to prevent further loss of the non-transplanted hair after the hair restoration procedure.

Q: I am taking finasteride as you prescribed. You also suggested using minoxidil liberally over the entire front and top of my scalp once a day. During our meeting I think that you said that once I start using this I would not be able to stop it, and, if I did, it might lead to further hair loss. Hence, I decided to use the laser comb three times a week in addition to the finasteride. Having said that, if you still feel I should start using minoxidil daily, I will start doing so. — H.K., Brooklyn, NY

A: Stopping therapy doesn’t lead to further hair loss in that it doesn’t accelerate it; you just continue on the path that you would have been without the treatment. When you stop, there may be an initial shedding as you quickly lose any benefits that you had from the treatment.

The following applies to all three treatments: finasteride, minoxidil, and laser therapy:

1. Only work when you use it
2. Reversion to where you would have been when you stop (but not worse)

However, the important issue is efficacy:

Finasteride >> minoxidil > laser therapy

This is the reason I recommended finasteride and minoxidil.

Q: I heard that Propecia stops working after five years. Is this true and why in five years? — B.P., Stamford, CT

A: That is not correct. Although the effects of Propecia (finasteride 1mg) will diminish over time, it does continue to work. Using finasteride long-term will still be better than stopping it at some arbitrary interval. In clinical practice, I often increase the dose of finasteride, after someone had been on the medication 3 to 5 years, to help maintain its effectiveness.

Q: Although I was prescribed Propecia, I have not yet started to take it. I would like to take it now, but my wife wants me to wait until after we have our second baby so as to avoid having the drug in my system when we conceive. She’s concerned that if it’s so harmful to pregnant women, that having it in my sperm is an issue. — L.V., Bellmore, New York

A: There is no evidence that if you take the medication it will affect the fetus. However, your wife should not ingest the drug or handle broken pills during pregnancy.

Read more about Propecia and Side Effects.

Q: Can dandruff cause hair loss? I have a lot of dandruff and use the Nizoral Shampoo for it. And can the Nizoral be a reason I am losing my hair? — K.P., Suffern, NY

A: Dandruff (the medical term is seborrhea) does not cause hair loss as it is a condition that involves scaling and redness on the surface of the scalp and does not involve the growth parts of the hair follicle that lie deeper in the skin. Although Nizoral is an ineffective treatment for hair loss (it is sometimes prescribed for this) it will not cause hair loss.

Q: Should I use Nizoral every day? — L.S., Houston, TX

A: The product recommendation is to use Nizoral shampoo twice per week for dandruff, but many patients prefer to use it daily. Other than drying out the scalp, it is safe to use daily. The 1% formulation is over the counter. The 2% requires a prescription.

Read more about Medical Treatment of Hair Loss

Q: I use Nizoral for my dandruff. Does it work for hair loss too? — M.D., Danbury, CT

A: The active ingredient in Nizoral is Ketoconazole. This medication, originally developed to treat fungus infections, has slight anti-androgen action. It is supposed to work in hair loss by inhibiting the action of DHT on hair follicles. Although, in theory, it should be useful for androgenetic hair loss, there have not been conclusive scientific studies to show that it works to treat balding when used as a topical application for balding.

Q: I heard that the sexual side effects of Propecia are irreversible. Is this true? — L.R., Parsippany, NJ

A: The sexual side effects of finasteride (Propecia) begin to subside soon after the medication is discontinued. This would make sense since the drug finasteride is a reversible inhibitor of DHT. Although it is possible for side effects to be persistent after stopping the medication, this situation seems to be very uncommon and a cause and effect relationship is still in question.

One should consider that sexual dysfunction is relatively common in the adult male population and millions of patients take finasteride. Thus, there is a likely probability that some patients on finasteride may experience sexual dysfunction unrelated to the medication and, therefore, when the medication is stopped, the side effects would not be expected to go away.

Another thing to consider is that once a patient experiences sexual dysfunction (from a medication or another reason) psychological factors may come into play that make the side effects persist, even though they are unrelated to the medication or other underlying cause that may now be gone.

It is important to keep in mind that medication plays an important role in the prevention and treatment of androgenetic alopecia and decisions to use medications should be done thoughtfully and in an informed way. Blog postings can offer some subjective information, but they do not constitute true research and should be used in conjunction with the information provided by your physician and other informed sources.

Learn more about Propecia (finasteride) and other hair loss medication.

Q: I saw your post on the clinical trials of Latisse (bimatoprost) for hair loss on the scalp. What is the status of the study? — B.V., New Providence, NJ

A: Allergan, the company that makes Latisse, conducted safety and efficacy testing of three formulations of the drug for men with androgenetic alopecia (male pattern baldness). Latisse is a drug that is approved by the FDA to help eyelash growth at a concentration of 0.03 %. The drug is applied daily to the upper eyelid.

Allergan studied the results of three formulations of Latisse (Bimatoprost .03% Opthalmic Solution) comparing them to results of a control option and also an over-the-counter minoxidil 5% solution. The drugs were applied directly to the scalp, and the progression of hair loss was measured.

This study began in June 2011 and the results were published in April 2014. The results of the study did not indicate that Latisse would be a viable alternative to use on the scalp to prevent hair loss.

It should also be noted that the cost of bimatoprost, the active ingredient in Latisse is significantly more expensive than minoxidil, the active ingredient in Rogaine. This means that even if the two treatments were equally effective, it would be cost-prohibitive to treat baldness with Latisse.

Latisee (Bimatoprost .03% Opthalmic Solution) has not been FDA approved for the treatment of scalp hair loss.

For more information, view the results and details of the study on ClinicalTrials.gov .

Read more about Latisse/Bimatoprost.

After trading anecdotes with fellow hair loss physicians about how finasteride can reduce body hair in some patients, Sharon A. Keene, M.D. took the next logical step and asked whether finasteride might have a negative effect on patients who have body hair transplant (BHT) procedures.

In a review of scientific literature on whether finasteride effects body hair growth, Dr. Keene finds that current research is inconclusive.

Finasteride, the drug in the hair loss medication Propecia, works by blocking the 5-alpha-reductase type 2 enzyme (5-AR Type 2) which is needed by the body to covert testosterone to DHT. DHT causes common baldness, by making hair follicles shrink and eventually die.

In looking at DHT’s effect on body hair growth, current research strongly suggests that it does play a key role. Males born with a deficiency of 5-AR Type 2, and thus no DHT, have reduced, or absent, body hair growth (and no loss of scalp hair).

It would seem logical then, that when finasteride is used to re-grow hair on the scalp, it would also inhibit the growth of hair on the body. However, the genetic variation among people is too great to determine exactly how much of an influence it plays.

With this uncertainty of DHT’s effects on body hair, it is impossible to say, without further study, if finasteride would have the same effect on body hairs which are transplanted to the scalp. In Dr. Keene’s conclusion, she suggests:

A patient on finasteride for at least a year who undergoes BHT is probably safe to continue it, as remaining body hairs are apparently not sensitive to the effects of this drug.

You can read the full discussion and review of current research in the January/February 2011 issue of Hair Transplant Forum International, the official newsletter of the International Society of Hair Restoration Surgery (ISHRS).

• Read a detailed review on how DHT causes hair loss in men
• Read more about body hair transplants

Q: I started using both Propecia (finasteride) and Rogaine for roughly the past 15 weeks. In the last month I’ve been experiencing pain in my left testicle area. At first I thought this may be due to Varicocele; however, after some quick internet searches I thought it may also be the Propecia. The pain doesn’t seem to be in the testicle itself as much as the surrounding veins on the left side. What should I do? — B.L., Houston, TX

A: Your symptoms are the classic ones of a varicocele, namely pain on the left side that is adjacent to the testicle. Symptoms of finasteride would more likely be bilateral, although the discomfort does not need to be in the testicle itself. If your symptoms are worse at the end of the day when you have been standing, and less in the AM when you first arise, these suggest a varicocele.

In your pain is consistently worse towards the end of the day, I would see a urologist, as surgical intervention might be warranted, particularly if it is affecting sperm counts – which should be checked as part of the evaluation.

If this is not the case, then stop finasteride for a least a month and see if the symptoms subside. If they do go away off finasteride, I would not take the medication again. If the symptoms persist off finasteride, I would still see a urologist.

Read more about Propecia in our section on hair loss medications.

Q: If I had a body hair transplant to my scalp and then took Propecia to prevent further hair loss, could finasteride thin out the transplanted hair? — T.M., Yonkers, NY

A: In theory, yes!

You may be interested in a somewhat related question about the effects of finasteride on body hair. Read more posts on body hair.

Q: I am currently taking Avodart and have done so for around 8 months. Last night I had a significant loss of hair after taking a shower, nothing like I have ever seen before and found it very distressing. Can you tell me if this is hair loss or could it be something known as shedding and could you please tell me what is the difference between hair loss and hair shedding? — M.S., New York, NY

A: Hair loss is a very general term that can refer loss of hair for any reason. Genetic hair loss is caused by the effects of DHT on hair follicles that result in miniaturization -– i.e. a slowly progressive change in hair diameter that starts with visible thinning and that may gradually end in complete baldness. Hair shedding is more sudden where hair falls out due to a rapid shift of hair from its growth phase into the resting phase. The medical term for this is telogen effluvium. This process is usually reversible when the offending problem is stopped. It can be due to stress, medication, or other issues. You should see a dermatologist to figure out which process is going on. Dutasteride can cause some shedding when it first starts to work, but it would be unusual to do this after being on treatment for eight months.

Read more about the Causes of Hair Loss in Men, view our Hair Loss Glossary, or read more about Avodart Hair Loss Medication.

Q: I am a 34 year old male and my dermatologist prescribed Propecia for me today. Most of my hair loss is at the hairline, but there is some loss on top as well. It’s not bad, I just want to stay ahead of it. If I get a transplant I want to get it at your clinic, but I will give the Propecia a try first. I am going to be overseas for a couple of months starting this Sunday and I was wondering about the necessity or desirability of having someone measure my hair density prior to starting the Propecia. Would you advise waiting to start the Propecia until I come back in two months and having my density examined at your clinic? — M.R., Great Falls, Virginia

A: I would start Propecia as soon as possible. What is important for a hair transplant is the density in the donor area and this is not affected by Propecia (or minoxidil). Your donor density can be measured anytime at an evaluation prior to surgery. If you want to wait to see the effects of Propecia prior to the hair transplant, you really should wait a year; since growth, if any, can take this long. If you just want to have Propecia on board for the hair restoration procedure, or to make sure you don’t have side effects, then generally a month will do. If you would like to do a photo consult through our website to get some preliminary information about how many grafts you might need, you can do that at your leisure, but start Propecia now since the longer you wait the less effective it will be at regrowing hair.

Q: I have been taking one tablet of Propecia daily for the past 5 years, with good results, until May of this year. At that point I started to experience some hair loss and so you recommended that I switch from Propecia to generic finasteride and increase the dose to 1/2 of a 5 mg pill per day. I started taking the 1/2 tablet of finasteride daily one month ago, and for the past 2 weeks I have seen a lot of hair in the bathtub and on the towel after taking a shower. I have not made any other changes in my diet or my shampoo, and I do not have any conditions on my scalp. Please advise me on what needs to be done. — C.C., Floral Park, New York

A: Just continue the medication at the higher dose. Either the finasteride hasn’t started working yet or you are getting temporary shedding from the medication (which means that it is working).

Q: I’m concerned that finasteride might result in unwanted body hair on the arms, back, etc. Is there any truth to this? My thinking is that since finasteride blocks the enzyme 5 alpha-reductase which converts testosterone to its more active form, DHT (dihydrotestosterone), is it possible that it might actually have some effectiveness in ameliorating unwanted hair? — P.P., Stamford, CT

A: Yes, finasteride does have some ability to decrease body hair, since growth of body hair is stimulated by DHT. However, the effects of finasteride are mild and not observed by everyone, so if you have unwanted body hair you will probably need some other means to remove it such as waxing, laser hair removal or electrolysis. The important thing is that finasteride doesn’t increase body hair.

Q: You mentioned that the hair at my crown and other areas where I now have baldness hasn’t really fallen off but has thinned to a great extent and that taking Rogaine and Propecia might help increase their thickness. If the medications do restore the hair thickness, I’m curious why you said that I could look like how I was 1 to 2 years ago. Technically, shouldn’t I be able to regain much more of my hair (and look like how I was longer than before that) since the follicles are all still there? — H.D., Park Slope, NY

A: Although Propecia is much more effective than Rogaine, even when used together, the medications are just not that effective in reversing the miniaturization process. They may bring you back to the way you were a few years ago, but will not restore your adolescent density.

Read more about hair density and miniaturization, Propecia, Rogaine, and other hair loss medication.

Q: Is it recommended to wait for 1 year after starting Propecia, when the effect of the medication kicks in and improves density of donor area, and then perform the surgery? — Z.B., Bergen County, New Jersey

A: Propecia will not affect the donor area, as this area is generally not impacted by the miniaturizing (thinning) effects of DHT –- the hormone that Propecia blocks. The purpose of waiting the year is to possibly regrow hair in the recipient area. If regrowth is significant, a hair transplant may not be necessary. If a person’s hair loss is extensive and there is little chance that Propecia will grow a significant amount of hair back to give a satisfactory improvement, then waiting the year is unnecessary.

Read more about Propecia or read a summary of a study on the effect of Propecia on a hair transplant.

Q: I have read that a lot of doctors today administer Midazolam (Versed) to sedate the patient. I have two questions in reference to this drug: 1) How does the doctor determine how much of a dose to administer to the patient and 2) is the drug administered all at once, or intermittently throughout the procedure? — D.D., Bronxville, NY

A: Each doctor has a different protocol, so it is hard to generalize. At Bernstein Medical we usually use Versed 2 to 4 mg IM one time 10 minutes prior to giving the local anesthesia. The dose is not repeated.

We also use Valium 5-15mg by mouth. I determine the dose of each based on body weight and history of sensitivity to sedatives.

Read more about the Hair Transplant Procedure.

Q: I am currently 28. I have been taking Propecia for 6 years and recently began to grow sparse chest hair for the first time in my life. Is the Propecia causing these effects? — H.L., Gowanus, Brooklyn, NY

A: DHT causes male pattern baldness and stimulates the growth of body hair. The use of Finasteride, a DHT blocker, will permit scalp hair to grown and inhibit the growth of body hair, not stimulate it.

However, the effects on body hair are quite small, so your natural tendency to grow chest hair over time is probably not being blocked by the treatment.

Read more about propecia and the effects and effectiveness of the medication.

Q: Hey doc, you told me to cut up 5mg finasteride into four parts. Why not five, so that it will be equal to Propecia which is 1mg? — H.F., Eastchester, NY

A: For several reasons:

1) you will lose some of the medication in the cutting process,
2) the generic dose can be slightly less than the brand, and
3) it is too difficult to cut into five parts – four is hard enough.

Note that due to the fact that finasteride stays in the hair follicle for a long time, the pieces do not have to be in four equal parts.

Q: I have a friend who has been using Propecia 1mg a day for twelve months without having any regrowth. Is he likely to experience regrowth at this stage? — S.S., Long Island, NY

A: Your friend is unlikely to get any significant regrowth after one year, but that doesn’t mean that the medication is not working. He may have had even more hair loss without the medication.

Q: I know that Propecia works in only about half of patients. Are younger people more likely to be helped by this medication? — V.C. Greenpoint, Brooklyn

A: The main studies by Merck looked at men between the ages of 18 and 41. The five year data (which, in my view, is most important) showed that 48% of men had an increase in hair growth and 42% had no change over baseline. Thus a full 90% held on to their hair or had more over a 5-year period. This compares very favorably to the placebo group where 75% lost hair over the 5-year period.

I think the most interesting question relates to the 10% who continued to lose hair in the treated group. Did these men lose hair at a slower rate than the non-treated group? Based on the action of finasteride on blocking DHT and DHT’s central role in causing male pattern hair loss, it is reasonable to assume that even these “non-responders” did have some benefit from the drug, albeit small. If half of those on the medication who continued to lose hair did so at a rate slower than the placebo group, then 95% of patients actually benefited from the medication to some degree – an extraordinarily high success rate, in my opinion.

Q: Is using Minoxidil combined with Retin-A better than regular Minoxidil for Hair Loss? — L.W., Gowanus, New York

A: Minoxidil has been prescribed (off-label) in combination with other medications, such as topical retinoic acid (Retin-A), to enhance its penetration into the skin and thus increase its effectiveness. This combination of medications can increase the absorption of minoxidil into the bloodstream and may increase the risk of potential side effects, including changes in blood pressure and scalp irritation. It is important to use combination therapy under the supervision of a physician.

If person wants to add Retin-A to the minoxidil regime, the Retin-A should be applied only once a day, since the Retin-A will bind to the skin and will last for at least 24 hours.

Applying Retin-A more frequently will not increase its effectiveness (in facilitating the absorption of minoxidil); it will only increase the incidence of side effects. Retin-A can be applied to the scalp at the same time as Minoxidil, or by itself.

Explore the pro’s and con’s of Minoxidil — also known by its over-the-counter product Rogaine — at the Rogaine/Minoxidil page or by viewing posts tagged with Rogaine (minoxidil).

Q: I’ve now been taking finasteride for just over 5 months. I have noticed that my semen quality has changed just in the last 3 months, and it seems now much less in quantity and is quite watery and clear in color. I think the current problems are due to the finasteride, what do you think? — S.F., Rolling Hills, California

A: Finasteride, the active drug in Propecia, can change the quality of the semen, since it is decreasing the component of seminal fluid that is secreted by the prostate. You may want to consider having your sperm counts checked, as finasteride can lower this. If the symptoms are not bothering you, and your sperm counts are normal, it should be OK to continue the medication. If you were having difficulty conceiving, then I would stop the medication.

• Read more information on Propecia (finasteride)

Q: What time should I take the Propecia? Does it work better if I take it at night as opposed to the morning and should I take it with meals? — B.J., Garden City, N.Y.

A: It doesn’t matter what time of day you take Propecia and the time can very each day.

The absorption of Propecia (finasteride) is not affected by food, so it can be taken without regard to meals.

Q: I started thinning and saw more hair in the tub. I began Rogaine and stopped shampooing every night and is seems that there is now more coming out every time I shower. What is going on? — E.U., Short Hills, NJ

A: Rogaine can cause shedding at the beginning of treatment (i.e. in the first 3 months) but this is expected as it causes some hair to begin a new cycle of shedding and re-growth. This means the medication is working.

Another reason for your apparent shedding is that the less you wash your hair, the more will be lost each time. Go back to shampooing every day and see what happens.

Q: If I get transplants, do I still have to continue taking Propecia? — P.V., Chelsea, N.Y.

A: Yes, you should.

You do not need finasteride (Propecia) for the hair transplant to work, or the transplanted hair to continue to grow, but finasteride can decrease further hair loss.

Q: Do you think there is a difference in the efficacy between the 5% Rogaine foam or liquid formula? — N.N., Dallas, TX

A: In theory, the foam should be as effective as the original solution (liquid). However, an important part of the efficacy is getting the medication directly onto the scalp – rather than just on the hair.

For patients who are applying the medication to areas with a significant amount of hair, using the solution with a dropper applicator enables the medication to best reach the scalp. Because of this, I prefer that patients use the solution with a dropper applicator if they are using the medications in areas with a significant amount of hair. If patients find the solution irritating to the scalp (or too messy) and the foam less so, then using the foam is better than nothing.

• Read about Rogaine (minoxidil)

Q: Medical information suggests that Rogaine works for about 50% of the men who try it. Does Rogaine actually worsen hair loss in some men? The Rogaine website states that during the first three weeks of use Rogaine causes increased shedding. If true, would intermittent use of Rogaine make hair loss worse even in men for whom Rogaine would work if applied daily as directed? — V.C. Greenpoint, Brooklyn

A: Rogaine, the brand name for the drug Minoxidil, does not worsen hair loss, but can cause initial shedding (which actually shows that the drug is working).

The medication should be used on a continuous basis for the long-haul. Intermittent use of the drug, or pulsing, makes no medical sense.

Q: I recently had a hair transplant about a month ago. Currently I’m on Propecia and I am a stickler to taking it at the same time every day. I don’t, however, use Rogaine namely because I fear the irritation it can possibly cause will halt graft growth and because I’ve heard that the grafts and post-surgical shock loss hair will return without its use. Is it ok to use only Propecia post-surgically? Or would adding Rogaine be of any significant benefit? — L.B., Rye, NY

A: I would definitely stay on Propecia (finasteride) and, if you like, you can add Rogaine (minoxidil) – it may have a little additional benefit. The 5% foam formulation is less irritating and can be started a week after the hair transplant.

The only problem with Rogaine is compliance. If you think that you will use it long-term, it is worth using. If, however, you think that you will get tired of it and stop, then it is not worth starting.

Any shedding with either medication is temporary and usually indicates that the drug is working.

Read about Rogaine (minoxidil)
Read about Propecia (finasteride)

Q: Are there DHT blockers that are sold in the pharmacy over the counter? — C.C., — Fairfield County, Connecticut

A: The only effective DHT blockers are finasteride (Propecia, Proscar) and dutasteride (Avodart).

These medications require a doctor’s prescription and are not sold OTC. Nizoral is a topical shampoo for seborrhea (a type of dandruff) that is sold over the counter, but it is not effective in treating hair loss.

Q: I have hair loss due to a treatment of Accutane. I have been off this medication for about a year and a half now, yet my hair has not recovered. The texture of my hair has completely changed. Given the fact that there is no family history linking me to male pattern baldness, I attribute my hair loss exclusively to Accutane. What should I do? — H.F., Eastchester, NY

A: If the texture alone has changed there is nothing you can do except to wait. The texture should improve over time even though it has already been 18 months.

If there are signs of genetic hair loss (i.e. male pattern alopecia), then finasteride should be considered.

Q: I heard that there is a new drug on the market called Avodart for prostate enlargement which might help with hair loss as it blocks the conversion of testosterone to DHT better than Finasteride and is more effective than Propecia. Do you recommend taking it and if so what is the dose? — Y.B., Orlando, Florida

A: I am currently not recommending that patients take Dutasteride for hair loss, although it is more effective than Propecia, finasteride 1mg. (Dutasteride 0.5, the dose generally used for hair loss, seems to be slightly more effective than finasteride 5m in reversing miniaturization.)

The reasons that I am hesitant to prescribe it at present are outlined in the Hair Restoration Answers question, “Is Avodart Safe?”

In addition to the reasons that I listed in that response, I would also consider that: Dutasteride, unlike finasteride, decreases sperm counts, it can result in persistent decreased sex drive and the incidence is greater than with finasteride. Finally there are a significant number of alpha-type 1 receptors in brain, those affected by dutasteride, but not finasteride.

However, since Dutasteride is approved for older men with prostatic disease, using it for hair loss in this age group (usually in a lower dose) is reasonable.

Q: Our dermatologist originally suggested our son use the 5% Rogaine and he developed an allergic reaction to it. Allergy tests confirmed it was the propylene glycol causing the reaction. I understand that Rogaine foam has 5% minoxidil in it but no propylene glycol. Is that correct? — B.M., Lower East Side, N.Y.

A: In addition to minoxidil 5%, Rogaine Foam contains: butane, butylated hydroxytoluene, cetyl alcohol, citric acid, fragrance, glycerin, isobutane, lactic acid, polysorbate 60, propane, purified water, SD alcohol 40-B, stearyl alcohol — but no propylene glycol.

• Read about Rogaine (minoxidil)

Q: I am a 21 yrs old male having serious hair loss over the last few years. I also have very little facial hair. Since Propecia is a DHT blocker can it inhibit beard growth? — E.M., Astoria, N.Y.

A: As you suggest, it would be reasonable to assume that since DHT stimulates beard growth, blocking DHT (with finasteride) would tend to inhibit its growth. In practice, this does not seem to be the case, i.e. we don’t find that Propecia has any effect on facial hair. The reason is not clear.

It is interesting to note that testosterone stimulates growth of axillary and pubic hair, but not scalp hair. Scalp hair growth is not androgen dependent, only scalp hair loss is.

DHT stimulates terminal hair growth of the beard, trunk and limbs, external ears and nostrils. Of course, it also is responsible for the bitemporal reshaping of hairline as one passes into adulthood and causes male patterned baldness (androgenetic alopecia).

Q: I have been using Propecia since it was released to the public in 1998 and have found it to work very well. Recently, its effectiveness has stopped and my hairs are miniaturizing again. I am going to increase the dosage to 1/2 a pill Proscar every day. How long will the increased dosage take to stop the miniaturizing process? — T.U., Chappaqua, N.Y.

A: It seems to take the same time to work as when you initially started Propecia.

When patients increase their dose, I rarely see re-growth, but rather the expectation is that further hair loss will be decreased. When it does work to actually re-grow hair, we sometimes see an initial period of shedding, similar to when finasteride was first started.

Q: I’m male, early thirties and in the early stages of hair loss, too early for hair transplants. I am experiencing extreme shedding. I took Avodart for 6 weeks, but because of the shedding I stopped. Now, it still continues as strong as ever. I’ve been losing about 200 hairs every day in the shower. 3 months ago I had so much more hair, what is going on? I heard that shedding can happen, but not like this. Could this have caused telogen effluvium, or something else? — M.M., Boston, Massachussetts

A: Since Avodart (dutasteride) is a more potent medication than Propecia (finasteride), the shedding (telogen effluvium) may be more dramatic. If you have made a decision to use Avodart, then you need to tolerate this short-term effect. It should subside within the first 6 months on the drug.

Q: I stopped using Rogaine for my hair transplant, when can I start using it again? And would it be any different with the new Rogaine foam. — J.N., London, United Kingdom

A: I would wait at least 7 days to use Rogaine (minoxidil) in either liquid or foam.

The foam has less alcohol and can be irritating when applied to open wounds, but should be fine one week post-op.

Q: I heard that Rogaine only works on the crown and not on the front or top of the scalp. Is this true? — D.D., New Haven, Connecticut

A: Rogaine (Minoxidil) has the potential to work where ever there is miniaturized hair, either the front, top or crown (however, it will not work in areas that are completely devoid of hair).

The reason for the misconception that it will not work in the front is because the clinical trial performed by Merck in the 1980’s, that led to FDA approval, only studied the vertex (crown) and thus the company was limited to this labeling. Several years later, Merck realized that this was a misjudgment in the design protocol and ran a new study (approximately one fifth the size of their Phase III vertex trial) to document effectiveness of the drug in the front of the scalp. This allowed them to avoid the vertex restriction in their label.

Another reason for the confusion is that since the hair in the crown seems to have a longer miniaturization phase than hair in the temples, there is a greater window of time in which the medication can act on these hairs. This goes for both minoxidil and finasteride (Propecia).

Q: I am 22 yrs old and I started shedding hair in a very limited form since I was 20. I have now been on Propecia for nearly 8 months. To date I have not experienced any benefit. In fact, I have seen my hair continue to thin. Is it possible that this thinning is a result of Propecia? — M.M., Boston, Massachussetts

A: Usually the shedding associated with finasteride will subside by 6 months.

If you are still losing hair at 8 months, most likely the medication is not working. Unfortunately, it is not effective in about 15% of patients.

Q: I am 26 and I have been diagnosed with Diffuse Unpatterned Alopecia (DUPA) and realize I am not a candidate for hair transplants. I have been on Propecia for about 9 months. There have been periods of increased shedding throughout and I am still shedding what seem to be mostly very fine, miniaturized hairs. Do you think this is the Propecia speeding up the hair cycle and pushing out the old fine hairs, or do you think this is an increase in the pace of my genetic balding? I know that your post states that the accelerated hair loss generally stops by the 6th month. Does DUPA have any effect on the timeframe? Also, I have read that Propecia is only effective for about 50% of patients with DUPA. Do you find that to be true, or have you found a different experience? — T.T., White Plains, N.Y.

A: It is hard to tell at 9 months whether it is shedding from the finasteride or that the medication is just not working. Since there is no way to tell, I would stay on the medication for 2 years for any possible shedding from the medication to have passed and to see if your hair loss actually stops.

Since the natural history of DUPA is so unpredictable, I would give it the full two years rather than the 1-year trial the company recommends. There is no real scientific data to support this recommendation, however.

Please take heart in the fact that people with DUPA often look great (even without any hair transplants) if they keep their hair very short, since they never develop that cosmetically unappealing wreath of hair around the back and sides that is normally associated with extensive balding.

Q: I am 26 years old and in the beginning of losing my hair and not ready for hair transplant surgery. It seems to have stopped now but 4 months ago I shed a lot of hair and can visually see that my hair on the scalp is thinning out. I have looked into and read up on taking Propecia or more exactly Finpecia (I’m a student so cost is a factor), but can I trust this generic drug? Have looked at the company (Cipla) website but I’m still a bit scared of taking something I don’t really know what it is. What is your opinion on choosing Finpecia over Propecia? — E.E., Midtown East, N.Y.

A: Finpecia is manufactured in India by a slightly different method than the way Propecia is produced in the U.S. Since finasteride 5mg is now available in a generic from in the U.S., I suggest that you use finasteride 5mg and quarter the 5mg tablet with a pill cutter and take 1/4 tablet a day. The parts do not need to be the same size. In the U.S., generic finasteride and Propecia (1mg) and Proscar (5mg) are all made the same way. Cipla is a large company, but is not under U.S. FDA supervision.

• Read about Propecia (finasteride)

Q: I have been on Propecia for approximately 5 years. What does Propecia do to your PSA level, lower it or make it higher? Also, what would you consider a normal level while on Propecia? — H.K., Long Island City, N.Y.

A: Finasteride 1mg a day lowers your PSA around 50%. Therefore, when patients are taking finasteride, the PSA reading should be doubled.

Finasteride does not appear to decrease the sensitivity of the PSA test to detect prostate cancer – its main purpose.

PSA levels vary by age and by lab so I would check with your internist/urologist to evaluate your specific level.

In very general terms, for adults, it is ideal to have a PSA < 1.0 off Propecia and < 0.5 on it, but higher levels can also be fine.

Q: I believe I am an “early” IIIA or IVA. I am not losing any hair on the back of the scalp. There is no substantial hereditary hair loss on either side of the family, but I began taking Propecia four months ago and recently noticed a dramatic thinning of hair on the top (front) of the scalp, extending back to the rear of the head. — B.M., Lower East Side, N.Y.

A: Often people experience some shedding the first six months on finasteride as the new hair essentially pushes out some of the old. I would wait a full year before making any judgments about a hair transplant since you may see significant regrowth from finasteride in the second six months and may not need surgery at this point, particularly if the hair loss is early.

Q: I’m 52 years old and have been taking Propecia (finasteride) for two years. It seems to maintain the status quo with no apparent regrowth. I am considering adding a dose of Avodart (dutasteride) once a week in conjunction with the daily Propecia. My question is twofold: (1) Since dutasteride blocks production of both enzymes (type I and II) that produce DHT from testosterone, is it redundant to take the finasteride that only blocks the type I enzyme? — Y.B., Orlando, Florida

A: It is redundant to take both.

However, you may not be taking the optimal dose of dutasteride which seems to be at least 0.5mg a day for hair loss.

Q: If I use the dutasteride for one year and do not see a noticeable improvement can I quit the Avodart, continue the daily dose of Propecia and expect to retain the same “holding pattern” I have now?

A: If Avodart is helping to maintain the status quo then you can expect to lose some hair, i.e. return to where you would have been if you had used finasteride alone.

Read more about Hair Loss Medication

Q: Will Propecia and Minoxidil reverse some of the miniaturization going on with someone with thinning hair? If I do need a hair transplant will I have to stay on these medications? — C.C., — Fairfield County, Connecticut

A: Yes, both minoxidil (Rogaine) and finasteride (Propecia, Proscar) affect the miniaturization of the hair follicles and help restore the shrunken follicles to cosmetically viable hair.

Minoxidil works by directly simulating miniaturized follicles to grow, whereas finasteride blocks DHT, the hormone that causes hair to miniaturize and eventually fall out.

Finasteride is much more effective than minoxidil in preventing or reversing the miniaturization process and it is so much more convenient to use that we generally suggest finasteride after a hair transplant procedure, but rarely recommend minoxidil.

• Read about Rogaine (minoxidil)
• Read about Propecia (finasteride)

Q: I am a 22 yr. old male and have been on Propecia for exactly 4 months. When I started taking the medication, I was in the beginning stages of hair thinning/loss in the front and crown areas, with no change in my hair line. During the time I have taken Propecia, my hair loss has increased drastically. Is it that I just have to bite the bullet and am one of the few unlucky individuals that do not respond to Propecia? Could it be that I am taking the medication incorrectly? Wrong time of day? With or without food? Or, do I just need to give it more time? Is there still a chance I could at least regain the hair I’ve lost over these past 4 months? — A.B., St. Louis, Missouri

A: You are probably experiencing an accelerated phase of hair loss that is possibly made worse by the finasteride. The shedding from finasteride is common during the first few months of treatment and is temporary. The full effects of Propecia are not seen for 6 to 12 months.

I would continue to take the medication for at least a year before you judge if it is working. It does not matter the time of day or relationship to food.

Q: First off thank you for providing this Blog, it is extremely informative and gives people the opportunity to ask questions of one of the most knowledgeable hair transplant surgeons in the world. You are considered the consummate researcher in the field of hair loss, so I ask this question of you. It appears that all the current hair loss drugs, at one point or another, begin to lose their effectiveness. Have you ever entertained the idea of cycling these drugs, or reducing the dosage for a period of time, to prevent the body from becoming acclimated to these drugs and subsequently making adjustments to receptors causing this? This method is commonly used by bodybuilders and others in the sports profession to elicit the maximum effect from the drugs they employ. Though I have not found any studies along these lines, I believe there are valid reasons why this may work. I hope you may be able to share any information on this subject. — Z.Z., Chicago, I.L.

A: Excellent question. I can answer it only indirectly.

It has been our experience that when you discontinue finasteride (Propecia), or decrease the dose to a degree that it no longer works, the patient will begin to shed hair. When the drug is re-started or the dose increased again, the medications will begin working, but the patient now maintains his hair at a lower baseline. He doesn’t seem to regain the amount of hair he has before the medication was stopped. For this reason, we don’t stop and start finasteride. The same argument applies to dutasteride, although we have less experience with this medication. This experience would speak against using pulse therapy for hair loss.

On the other hand, the hair loss medications finasteride and dutasteride do not necessarily need to be used once a day. Although the serum half-life of finasteride is around 6 hours, the tissue half-life is felt to be around two days. Therefore, alternate day dosing with 2 mg of finasteride (or approx. 1/2 of a 5mg tablet) should work just as well as 1mg a day. An average daily dose of less than 1mg, however, does not seem to be as effective. Dutasteride has a half-life of 5 weeks and is found to bind to scalp tissue for many months, so with dutasteride, a dosing of even once a week will most likely be just as effective as once a day.

Note that this regular alternate day dosing is different than pulse dosing. In pulse therapy, the body is given a chance to recover. The principle here is to take advantage of the persistence of the drug in the scalp even after blood levels drop and not to let the scalp recover (which we have found to result in a net loss of hair (as discussed above).

When patients do become acclimated to these drugs (which seem to be common after 3 to 5 years) we increase the daily dose of finasteride gradually up to 5mg and then consider switching to dutasteride 0.5mg a day.

Q: My friend just came back from Paris and said that his cousin was taking Avolve for hair loss. Can you tell me what that is and is it available in the U.S.? — N.W., Portland, Oregon

A: Avolve is the European trade name for dutasteride 0.5mg made by GlaxoSmithKline for prostate enlargement. In the U.S. dutasteride 0.5mg, under the brand name Avodart, is FDA approved to treat prostate enlargement (BPH). It has not been FDA approved for hair loss.

• Read about Avodart (dutasteride)

Q: I have some early thinning in my crown and the doctor said I am too early for a hair transplant. I don’t want to take Propecia, but using Rogaine twice a day is a big nuisance. Can I use Rogaine once a day? — L.B., Cleveland, Ohio

A: The tissue half-life of minoxidil is 22 hours.

This means that 22 hours after it is applied, about 1/2 of the compound is still bound to the skin and exerting some effect. Because of this, once a day dosing is probably OK.

Please note that this is hypothetical and that there have been no controlled studies to confirm this.

Q: I have been on Propecia for a year and my hair loss has not stopped or slowed down. How much longer should I give the drug? Can Propecia speed up hair loss in some patients? — N.V., East Hills, N.Y.

A: If you have not responded to Propecia in one year, it is unlikely that you will.

Finasteride may cause shedding in the first 6 months of treatment, but should not accelerate hair loss long-term. It is most likely that you have progression of your hair loss.

In addition, be sure that you have a correct diagnosis i.e. that you actually have androgenetic alopecia.

Q: My query is prompted by your answer to another query “Is Avodart Safe?” My son, who is in his mid-20s, has been taking Dutasteride for hair loss for about two years now. He had tried Finasteride earlier but without much benefit. Medical supervision regarding Dutasteride is not available in Australia as the drug has not been released here yet. — N.V., Melbourne, Australia

I am concerned by your remarks that there is no biologic model to show the long-term safety of Dutasteride (as opposed to Finasteride). Would you suggest that he goes back to taking Finasteride? We would be grateful for your advice.

A: It is a tough call as I have never met or examined your son, so I can only offer an opinion based on limited information. If you feel your son will be emotionally or socially debilitated by the hair loss, then I think that it may be worth the risk (if there is any) of taking the medication; otherwise, I would use Finasteride.

Please keep in mind that you don’t need to make the final decision now. You may want to defer the decision until he is 28 or so, at time when he is more mature. It is a tough call. Please let me know what you decide.

• Read about Avodart (dutasteride)
• Read about Propecia (finasteride)

Q: A friend of mine is taking Finpecia, is this the same as Propecia?

A: Both Propecia and Finpecia contain the active ingredient Finasteride 1mg. Finpecia is manufactured in India by the company Cipla. It comes in packets of 10. Finpecia contains the same chemical ingredient as Propecia, i.e. 1mg of Finasteride, but it is manufactured differently and it is less expensive. — A.B., St. Louis, Missouri

Indian patent law allows companies in India to make medications that are patented by drug companies in other countries, since Indian law protects only the processes by which drugs are made and not medication itself. Therefore, if an Indian company finds another way to make a drug, it can legally do so.

Cipla has not published any studies showing that their generic Finasteride is identical or as effective as Merck’s original product in treating hair loss. These alternative processes and drugs are not regulated by the FDA, so there is no assurance that the medication manufactured in India has the same biologic activity or potency as the FDA approved counterpart made in the United States.

Q: My friend is taking Avodart, he bought it over the internet. Is it safe to take? — T.G., Denver, Colorado

A: Avodart (dutasteride 0.5mg) was approved by the FDA for the treatment of prostate enlargement in men in 2002. Avodart has not been approved for the treatment of androgenetic hair loss, although physicians can use an approved medication in ways other than for which it was specifically approved. That said, the use of dutasteride certainly requires a doctor’s supervision.

Like finasteride (the active ingredient in Proscar and Propecia), dutasteride blocks the enzyme 5-alpha reductase that converts testosterone to DHT (DHT is a key hormone that causes hair loss). However, unlike finasteride, which only inhibits the Type I form of the enzyme, dutasteride inhibits both the Type I and Type II forms. This combined effect lowers circulating DHT more with dutasteride than with finasteride, but also increases the incidence of its side effects.

The Type II form of the enzyme (blocked by finasteride) is found predominantly in the hair follicle. The Type I form of the enzyme has been found in the scalp and sebaceous glands, and many other parts of the body, but its exact role in hair growth has not been determined. It is felt that dutasteride’s ability to dramatically lower serum levels of DHT is what makes it a more potent medication in hair loss.

When considering the safety of dutasteride, one should consider the following:

• It acts on other parts of the body besides the hair follicle.
• Unlike finasteride, where families that had a deficiency of the Type II 5-alpha reductase enzyme were followed for years without any adverse effects, there is no natural biologic model to show the safety of dutasteride.
• Dutasteride has been approved for prostate enlargement in an older male population. It is not approved for hair loss and, in fact, the clinical trials for hair loss were discontinued, so there is no safety data for its use in younger patients. There is a greater incidence of sexual side effects with dutasteride compared to finasteride.
• The 1/2 life of dutasteride is 5 weeks compared to 6-8 hours for finasteride. Serum concentrations of dutasteride are detectable up to 4-6 months after discontinuation of treatment.

Q: I heard that Propecia was being used originally for shrinking the prostate, is this true? — M.D., New Hyde Park, N.Y.

A: Propecia (finasteride 1mg) is not a prostate medication that was serendipitously noted to have a side effect of re-growing hair, it is a medication that was known all along that it might be able to slow hair loss and/or to grow hair.

Although finasteride was first approved for the treatment of prostate enlargement, the researchers at Merck knew, at the outset, that there were families whose members were deficient in the 5-alpha reductase Type II enzyme and that the men in these families neither developed prostate disease nor went bald. In addition they had no long-term problems from the lack of this enzyme.

Merck used this natural model to develop a medication that could block the 5-alpha reductase Type II enzyme – the result was finasteride. Because the only approved treatment for symptoms related to prostate enlargement at the time was surgery, Merck developed finasteride as a medical treatment for this condition prior to developing finasteride as a potential treatment for men with male pattern hair loss.

This also meant that Merck would understand the safety profile of finasteride, and have it approved for a medical disease (symptomatic prostate enlargement), before developing it for a cosmetic condition.

The drug was first submitted to the FDA for the treatment of prostate enlargement as Proscar (finasteride 5mg) in 1991 and it was approved for this use in 1992. The drug was submitted for the treatment of men with male pattern hair loss as Propecia (finasteride 1mg) in 1996 and was approved for this use in 1997.

Q: What is the difference between Rogaine for men and Rogaine for women? — G.K., Hawthorne, N.Y.

A: Rogaine, the brand name of generic minoxidil, comes in formulations for both men and women. The men’s versions come in a 5% solution and a 5% foam while women’s products are the 5% foam and 2% solution. Of these, the strongest and most effective is the 5% men’s solution. This is due to the inclusion of propylene glycol, which is a vehicle that helps the active ingredient, minoxidil, to more readily penetrate the scalp. As the other products do not contain propylene glycol, they may be slightly less effective.

Instructions for use also differ on the label between the men’s and women’s products. All products (5% men’s solution, 5% men’s foam, 2% women’s solution) recommend twice daily use, except for the 5% women’s foam which recommends once daily application. In reality, a thorough once daily application seems to be nearly as effective as twice daily for all version of topical minoxidil.

While the 5% solution may be stronger, it is more irritating to the scalp and more difficult for some to tolerate. Some people have a sensitivity to the added propylene glycol and will experience redness, burning, itching, and irritation. If this occurs, patients should switch to the 5% foam or 2% solution. We also recommend that patients use enough of the medication when they apply to adequately cover the treatment area of the scalp. Often, this means using 2 or 3 capfuls of foam or 2-3 droppers full of the solution (2-3mL).

It is important to understand, that contrary to the more restrictive package indications, it works in all areas of the scalp where there is thinning. It is not only for use in the crown. Many patients find that evening application allows the full 4-6 hours of contact time necessary for absorption and that the product will dry overnight and no longer look greasy in the morning. Results can appear as early as 3-6 months, but we often advise using minoxidil for a full year before judging its efficacy. As the hair is always cycling and growing, the product will need to be continued daily for ongoing benefit.

Q Do Rogaine and Propecia work synergistically? — N.W., Chappaqua, N.Y.

A: They are synergistic, since the mechanisms of action are different.

Rogaine directly stimulates hair growth, while Propecia is permissive for hair growth by blocking DHT, the byproduct of testosterone that causes hair to miniaturize and eventually disappear.

The important thing to remember, however, is that for most people, Propecia is far more effective.

Q: I have early thinning on the top of my scalp and I was told to use Propecia, but I heard that is was only for men. What do you think? — T.G., Staten Island, NY

A: Women can’t take Propecia during the child-bearing years because, if ingested, it can cause birth defects in male offspring.

In post-menopausal women, where we see the greatest frequency of hair loss, it doesn’t seem to be effective.

In pre-menopausal women who do not plan to become pregnant or who already have children, we are still cautious about using the medication, since there effectiveness has not been proven and its long-term safety in this population has not been tested.

Q: If Rogaine is used only once a day will it still be effective? — I.P., Hempstead, Long Island, NY

A: Once a day topical use of Rogaine (topical minoxidil 2% and 5%) is probably almost as effective as using it twice a day. The reason is, although minoxidil has a relatively short half-life of several hours when given orally, when topically applied, it has a half-life of 22 hours in the skin.

This suggests that once-a-day dosing is a reasonable option. It is important to realize that Pfizer, the company that now makes Rogaine, specifically states that it will be less effective if used only once a day.

Read about Rogaine (minoxidil)
Read Tips on Using Rogaine

Q: I heard that Proscar, the 5mg version of finasteride, is now generic. Is that correct and is Propecia going generic as well? — F.J., Red Hook, Brooklyn, NYC

A: Yes, Finasteride 5mg (Proscar) is now available in a generic formulation. It is my understanding that Finasteride 1mg (Propecia) will not be available generically until the year 2012.

Q: I am currently taking Propecia 1mg a day for hair loss and heard that Proscar 5mg now comes in a generic form. If I get that, how should I take it? — G.A., Fort Lauderdale, FL

A: If you are currently taking Propecia 1mg a day, and want to switch to Proscar (Finasteride 5mg), you can either take Proscar 5mg, 1/4 pill every day or 1/2 pill every other day.

If you break up the pills, be mindful of the potential risk to pregnant women from handling crushed tablets. You can purchase a pill cutter in any pharmacy.

You should be aware that this dosing is not recommended by Merck and that there are no studies showing that either breaking up the pills or taking alternate day dosing is as effective as taking Propecia (Finasteride 1mg) a day.

That said, finasteride lasts in tissues for several days, so these alternate day dosing schedules seem reasonable.

Q: I am 35 years old and have been using Propecia for the last 3 years, waiting to save enough money for a hair transplant. I no longer feel comfortable using it due to side effects. Can hair transplantation still be effective even without continuing to take this drug afterwards? — Y.C., Matinecock, New York

A: Many people choose not to take Propecia or choose not to take it due to side effects and the surgical hair restoration is just as effective. The only difference is that medications can prevent further hair loss whereas surgery cannot.

Medications are not needed for the hair transplant to be successful or the transplanted hair to grow and be permanent.

Q: I have read on numerous websites that Propecia and Minoxidil work synergistically, and that a hair loss sufferer will see better results using them together than either one alone. Do you believe this is the case, or do you think Propecia is enough treatment by itself for someone who just began to experience slight hair thinning and is too early for hair transplantation? — K.V., Hewlett Bay Park, New York

A: They may act synergistically since their mechanisms of action are different.

Rogaine (Minoxidil) stimulates the hair follicle directly, but Propecia (Finasteride 1 mg) permits hair growth by blocking the negative effects of DHT. Of the two, Propecia is far more effective. It is reasonable to use the two together as long as the medications are used regularly.

For patients contemplating surgical hair restoration, we generally have them continue Propecia only, since applying Minoxidil is too fussy and offers only incremental benefit.

Q: I recently turned 22 and have been on Propecia for about 2.5 years. The amount of hair that de-miniaturized with daily 1 mg peaked about a year ago and I have seen steady thinning since. I feel that I am too young for a hair transplant. My question is whether or not an increase in dosage of Propecia is indicated here or if I should seek other options entirely? — N.W., Portland, Oregon

A: At 22 years old, I would increase the dose of Propecia before considering hair restoration surgery. However, it is important to realize that there is no scientific evidence that increasing the dose will have any additional effects. There are published data by Roberts et al in the JAAD in 1999 demonstrating that 5 mg is no better than 1 mg from controlled clinical trials.

I usually increase the dose when someone has been on the same dose of medication for about three years, although there is no good data on how exactly to increase the dose, or that it will actually make a difference.

For this purpose, I generally use finasteride in the form of Proscar 5mg every other day (or Proscar 1/2 pill every day).

If you break up the pills, be mindful of the potential risk to pregnant women from handling crushed tablets.

Q: I am 28 years old and was told that I have early Norwood Class 3 hair loss. I want to have a hair transplant but my doctor told me to use Propecia for 6 months and then come back to discuss surgery. I don’t want to wait that long, what should I do? — L.B., Oyster Bay Cove, NY

A: Actually, you should wait a full year. If you are an Early Norwood Class 3, the Propecia can work so well (in actually growing hair back) that you may not even need a hair transplant. The important point is that Propecia only starts working at 3-6 months and during this time there may actually be some shedding as the new growing hair literally pushes out the old.

A hair transplant performed at 6 months may not only be unnecessary, but growth from the medication may be attributed to the hair restoration surgery. I suggest to wait and see what the medication can do before going for hair restoration surgery.

Q: I am considering taking Propecia, but it I went to my local pharmacy in New York City and it is so expensive. Is there a way I can get it cheaper? — A.S.A., Midtown, Manhattan, NYC

A: The website sells Propecia online at a reasonable price. A doctor’s prescription is required.

Read about

Q: I am not yet ready for a hair transplant but am considering Propecia. What is your opinion on the “optimal dose”? I know Merck recommends 1 mg, but could I get away with taking less? Or would I get a better result by taking more (2-3 mgs)? — V.B, Darien, CT

A: You may get away with 0.5 mg a day. However, there are published data by Roberts et. Al. in the JAAD in 1999 showing a dose-response between 0.2 and 1 mg/day, with the lower dose showing reduced efficacy, from controlled clinical trials.

There is little evidence that a higher dose helps, but I often double the dose if a patient has been on 1mg a day for 3-5 years and then stops responding. The hope is that this can postpone the need for surgical hair restoration, but there is no scientific data to support that it will.

Q: I have heard that you should take Propecia for 6 to 12 months following a hair transplant. Is this correct? — P.E., Dallas, TX

A: I would only use Propecia if you plan to continue the medication long-term. That said, Propecia — the brand name of the hair loss drug finasteride — is very helpful in preventing further hair loss. I do recommend that patients who have hair loss stay on the medicine for an extended period, regardless of whether or not they decide to have a hair transplant procedure.

• Read about Propecia (finasteride)

Q: I am taking a baby aspirin to prevent heart disease and I heard that I should stop this medication before my hair transplant. How long should I stop for? — G.A., Fort Lauderdale, FL

A: You should discontinue the aspirin 10 days prior to your hair restoration procedure.

Other NSAIDs (non-steroidal anti-inflammatory drugs) need only be stopped 3 days before the hair transplant.

Both aspirin and other NSAIDs can be resumed three days after surgery. ((Otley CC: Preoperative evaluation and management in dermatologic surgery. J Am Acad Dermatol 2006; 54:119-2))

Here are some resources for before your hair transplant:

Before FUT Hair Transplant
Before FUE Hair Transplant

Here are some resources for after your hair transplant:

After FUT Hair Transplant
After FUE Hair Transplant

Q: I have been taking Propecia for three months. Would it help to up my dose? — F.J., Red Hook, Brooklyn, NYC

A: For most people (of average body weight of approximately 150 pounds) 1 mg is the ideal dose of finasteride (Propecia).

This is a statistical statement, however. There are some people who fall outside the bell curve. As we don’t know who these people are, we occasionally increase the dose on non-responders after 1-2 years, particularly for those who weigh significantly more than 150 pounds.

Remember, an increased dose also results in an increased risk of side effects and most people experience no additional benefit. There have been no scientific studies to support this regimen.

Read more answers to questions on Propecia Dosage

Q: I was wondering why you chose two years as the amount of time one should wait to judge the effectiveness of Propecia. Have you had patients who only saw results after that long? Why does Merck say 3-6 months and Dr. Rassman at New Hair say 6-8 months? I know these numbers aren’t arbitrary, but I’m just wondering what the logic is behind this and how does this relate to planning a hair transplant? — I.P., Hempstead, Long Island, NY

A: The Merck data showed that over 90% of patients had peak response at 1 year and this has been my experience as well.

Most patients show the most dramatic response between 6 to 12 months with some getting additional benefit up to two years. Prior to 6 months, the results are quite variable and there may even be a net loss due to shedding during this period, as the Propecia (finasteride) stimulates a new anagen cycle.

If one is planning to go on Propecia before a hair transplant to minimize any shedding from the surgery and to prevent future hair loss, one should start the medication at least one month prior to the procedure.

If one wants to use Propecia for the purpose of possibly avoiding hair restoration surgery, then one needs to wait at least a year to see if there will be enough regrowth.

Finally, if one is younger (i.e. in the 23-25 age range) one should be on Propecia for at least two years to give it every possible chance of working and see its maximum benefit before considering a hair transplant.

Read more about taking Propecia before a hair transplant
Read more about Propecia (finasteride)