Finasteride inhibits type II 5-alpha reductase enzyme and reduces the dihydrotestosterone (DHT) levels therby decresing the risk of BPH. Following this video, you will be able to learn more about the role of finasteride in treating benign prostate hyperplasia. Timeline: 00:00 introduction 01:37 BPH 02:57 drug target 04:10 5 alpha reductase enzymes 04:58 elevated DHT 06:22 structure 06:48 how it works? 08:37 side effects 08:53 dosage