Propecia (finasteride)

Medical journals, such as Dermatology and the Journal of the American Academy of Dermatology, are the best sources for studies on the efficacy and safety of Propecia. Paula Begoun briefly discusses it in her book "Don't Go Shopping for Hair-Care Products Without Me," using scientific evidence as the basis of her opinions. The American Hair Loss Association also goes into great depth about the pros and cons associated with Propecia.

Reviewers say that Propecia, available only by prescription, is one of the most effective, proven treatments for male-pattern baldness. Researchers say that only hair-transplant surgery is more effective, but still recommend Propecia first because it is much more affordable and is better suited to the beginning stages of hair loss. Experts claim, in fact, that Propecia is most effective when it is taken at the first signs of thinning hair. Studies show that it is superior to minoxidil (the active ingredient in Rogaine), but many people use both products for maximum results. Experts warn that a small percentage of men will experience sexual side effects, namely loss of libido, but suggest that all side effects disappear completely when treatment is discontinued. Propecia is not safe for women who are or may become pregnant, as even handling the tablets can result in serious birth defects.