Cyproterone acetate combined with estradiol results in a subjective improvement in hirsutism compared to placebo. Clinical differences in outcome between cyproterone acetate and other medical therapies were not demonstrated in the studies included in this review. This may be because of the small size of the studies, lack of standardized assessment and lack of objective determinants of improvement in hirsutism. The endocrinological effects of the different drug therapies reflect the mode of action. Larger carefully designed studies are needed to compare efficacy and safety profiles between drug therapies for hirsutism.
Comparison of flutamide and cyproterone acetate in the treatment of hirsutism: a randomized controlled trial.
The objective of this study was to compare the efficacy of flutamide and cyproterone acetate in the treatment of hirsutism. Twenty-two women with idiopathic hirsutism were randomized to receive either flutamide or cyproterone acetate. Each patient underwent a complete gynecological examination as well as an endocrinological profile and hematological, hepatic and renal function analyses. Hirsutism scores were determined using a modified Ferriman-Gallwey scoring system. These tests were then repeated at 3 and 9 months of therapy. Eleven patients received 250 mg of flutamide twice daily and 11 patients received 100 mg of cyproterone acetate on days 5-14 of the menstrual cycle. Ferriman-Gallwey scores were decreased significantly in both groups at the end of 9 months. There was a trend towards a better response with flutamide, that did not achieve significance. Another significant difference was the increased sex hormone-binding globulin in both groups. A statistically significant decrease was also observed for the levels of testosterone on both drugs. No subject withdrew from the study due to a side-effect. The data suggest that both flutamide and cyproterone acetate were similarly effective in treatment of hirsutism, and that the pure antiandrogen flutamide is a safe, well-tolerated and effective alternative in treatment.