Dutasteride is a 5-alpha reductase inhibitor used for treatment of BPH either as a monotherapy or as a combination therapy. his video presents a detailed account of Dutasteride covering everything from mode of action to side effects. Timeline: 00:00 introduction 01:13 uses 02:13 5 alpha reductase enzyme 04:10 structure 04:53 how it works? 06:23 side effects 06:58 contraindications 08:28 drug interactions 08:58 dosage