Several doctors told me by that taking Finasteride (AKA Proscar or Propecia), I have a better-than-even chance of reducing hair loss.
This Wikipedia article cites one study the corroborates this claim, but it leaves some important questions unanswered. For example: Was the study conducted by someone affiliated with a pharmaceutical company? Is it possible that other studies, that had different conclusions, have been conducted but not published?

Can anyone cite more reliable information about this issue?


Separate studies are conducted on men and woman.

Long-term treatment with finasteride 1 mg decreases the likelihood of developing further visible hair loss in men with androgenetic alopecia (male pattern hair loss) European Journal of Dermatology, vol. 18, pages 400-20 reports:

Finasteride 1 mg treatment led to a 93% decrease relative to placebo in the 5-year likelihood of developing further visible hair loss (95% CI: 89-97%; p < 0.001). We conclude that, in men with AGA, treatment with finasteride 1 mg/day over 5 years led to a marked and sustained decrease in the likelihood of developing further visible hair loss.

However, see also: Persistent sexual, emotional, and cognitive impairment post-finasteride: a survey of men reporting symptoms American Journal of Men's Health vol. 9, pages 222-228.

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