TLDR Topical finasteride didn't significantly reduce facial hair, but patients felt it helped.
The study investigated the efficacy of 0.5% finasteride cream in treating idiopathic hirsutism in 35 women by applying the cream to one side of the face and a placebo to the other. After 6 months, both the finasteride and placebo sides showed a significant reduction in hair number and thickness, but there was no statistically significant difference between the two treatments. Despite this, many patients reported a perceived reduction in hair growth and thickness on the finasteride-treated side. The study concluded that topically applied finasteride did not significantly affect facial hirsutism, although patients felt there was an improvement.
November 2020 in “Journal of The American Academy of Dermatology” Finasteride 1 mg every other month works as well as daily dose for hair loss maintenance.
4 citations
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January 2015 in “Journal of drug assessment” Finasteride gel effectively and safely reduces hair thickness in women with excessive hair growth.
27 citations
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July 2009 in “Experimental and Clinical Endocrinology & Diabetes” Finasteride safely reduces excessive hair growth in women.
29 citations
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April 2004 in “Annals of Pharmacotherapy” Finasteride reduces hirsutism effectively with fewer side effects but is a second-choice treatment due to safety concerns.
40 citations
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January 2003 in “Gynecological Endocrinology” Finasteride effectively reduces hair growth in women with polycystic ovary syndrome or idiopathic hirsutism.
10 citations
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June 2001 in “PubMed” Finasteride is effective in growing hair and stopping hair loss in men with mild to moderate alopecia.
27 citations
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November 1998 in “Journal of Endocrinological Investigation” Finasteride significantly reduces hair growth in women with idiopathic hirsutism.
10 citations
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December 1995 in “Journal of women's health” Finasteride reduces hair growth in women with hirsutism and works better with electrolysis.