In men, finasteride (originally marketed as Proscar) is approved for hair loss associated with androgens. In one study, 62% of women also taking oral contraceptives containing the synthetic progestin drospirenone reported improvement. So it may be effective for female hair loss in the setting of increased androgen. But studies are limited and it is harmful to the male fetus so should not be used by women thinking about becoming pregnant or who are pregnant.
SOURCES: George Cotsarelis, MD, director, Hair and Scalp Clinic, University of Pennsylvania School of Medicine, Philadelphia. Andrew Kaufman, MD, assistant professor, department of dermatology, University of California, Los Angeles; medical director, Center for Dermatology Care, Thousand Oaks, Calif. Tom Barrows, PhD, director of product development, Aderans Research Institute Inc., Atlanta. Cotsarelis, G. and Millar, S.E. Trends in Molecular Medicine, July 2001; vol 7: pp 293-301. American Society for Dermatologic Surgery web site. American Academy of Facial and Reconstructive Plastic Surgery web site. American Hair Loss Council web site. Springer, K. American Family Physician, July 1, 2003; vol 68: pp 93-102. Hair Loss Help web site, "Interview with Dr. Ken Washenik from Bosley." Fuchs, E. Developmental Cell, July 2001: vol 1: pp 13-25.