PLEASE ONLY PURCHASE THIS ITEM IF YOU HAVE A PRIVATE PRESCRIPTION This belongs to a group of medicines called Type II 5 alpha reductase inhibitors. Your doctor has prescribed Finasteride because you have male pattern hair loss (also known s androgenetic alopecia). Finasteride increases hair growth on the scalp and prevents further hair loss in men. Men with mild to moderate, but not complete hair loss, can benefit from using Finasteride. Finasteride lowers the levels of DHT (dihydrotestosterone) in the scalp. This helps to reverse the balding process, leading to an increased hair growth and prevention of further hair loss.