Finasteride (Proscar). This agent has been
shown to be effective in men with alopecia.
However, finasteride should not be used in
women of childbearing age, because 5-reductase
inhibitors may cause abnormalities of the
external genitalia in the male fetus. Moreover,
finasteride has not been shown to be useful in
postmenopausal women with androgenetic
alopecia.8