Possible Side Effects Proscar
Check with your doctor if any of these most common side effects persist or become bothersome:* breast enlargement and/or tenderness; decreased sex drive; decreased volume of ejaculate; inability to have an erection.Seek medical attention right away if any of these severe side effects occur: * severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); breast lumps, pain, or nipple discharge.

Drug Class and Mechanism Proscar
Proscar is an enzyme inhibitor. It works by lowering levels of a hormone called DHT (dihydrotestosterone), which is a major cause of prostate growth; lowering DHT leads to shrinkage of the enlarged prostate gland.

More InformationProscar here
Proscar is to be used only by the patient for whom it is prescribed. Do not share it with other people.If your symptoms do not improve or if they become worse, check with your doctor.