What is "finasteride"

n. (context medicine English) An antiandrogen pharmaceutical used in the treatment of benign prostatic hyperplasia and androgenic alopecia

Finasteride, sold under the brand names Proscar and Propecia among others, is a medication used for the treatment of benign prostatic hyperplasia (BPH) and male pattern baldness (MPB). It is a type II and type III 5α-reductase inhibitor; 5α-reductase, an enzyme, converts testosterone to dihydrotestosterone (DHT).