TLDR Cyproterone acetate effectively reduced hair growth in hirsute patients by lowering androgen levels and altering androgen metabolism.
The study investigated the effects of cyproterone acetate (CPA) combined with estradiol on 150 hirsute patients over 6 months to 3 years, showing significant clinical improvement. Plasma testosterone (T) and androstenedione (A) levels decreased significantly, while T glucuronide (TG) and 3α-androstanediol (Adiol) levels remained high. T 5α-reductase activity in pubic skin also decreased. The study measured testosterone production rate (PR) and metabolic clearance rate (MCR) in 7 patients, finding a decrease in PR and an increase in MCR, explaining the plasma T concentration drop and high TG and Adiol excretion. CPA's mechanisms included reducing androgen input to target cells, competing for receptor binding sites, and decreasing androgen-dependent skin 5α-R, enhancing its antiandrogenic effect.
42 citations
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December 1976 in “PubMed” Cyproterone acetate and ethinylestradiol effectively reduce hirsutism and acne in women.
232 citations
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June 1975 in “Journal of Steroid Biochemistry” Cyproterone acetate is effective for acne but less so for hirsutism and alopecia, with some side effects and quick menstrual cycle recovery after treatment.
58 citations
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July 1974 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism” Cyproterone acetate combined with ethinyl estradiol significantly reduced hirsutism in women.
75 citations
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March 1999 in “Fertility and sterility” Finasteride, CPA, and flutamide are all equally effective in reducing excessive hair growth in women.
43 citations
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May 1986 in “Clinics in Endocrinology and Metabolism” Cyproterone acetate is effective for treating hirsutism and acne but less so for hair loss, with side effects similar to birth control pills.
105 citations
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January 2009 in “Medicine” Hirsutism is more linked to high androgen levels than acne or hair loss, and a mix of hormonal tests is best for diagnosis; certain treatments can reduce symptoms.
196 citations
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May 2001 in “The journal of investigative dermatology/Journal of investigative dermatology” Sebocytes play a key role in controlling androgen levels in human skin.
July 2015 in “Cambridge University Press eBooks” Androgens like testosterone affect skin health and can lead to conditions such as acne and hair loss, with various treatments available.