Taking finasteride may cause skin irritation. 1. Finasteride is indicated for the treatment of male pattern baldness (androgenetic alopecia) and promotes hair growth and prevents continued hair loss. According to its drug insert, Finasteride is generally well tolerated and adverse effects are usually mild. Possible adverse effects are decreased libido, impotence, decreased ejaculate volume, breast tenderness and enlargement and testicular pain. 2. In addition, some patients taking Finasteride may experience skin allergic reactions, which may be manifested as rashes, itching, hives and swelling of the lips and mouth and other uncomfortable symptoms. Once rash, itching and other discomforts occur, the drug should be stopped immediately and a doctor should be consulted. It is recommended that you need to consult a doctor before using Finasteride and use the drug under medical supervision to avoid adverse reactions.