Mechanism of Action: Dutasteride is a 5 alpha reductase inhibitor, which inhibits the conversion of testosterone to the more active metabolite 5 dihydrotestosterone (DHT). A combination therapy for androgenic alopecia based on quercetin and zinc copper dual doped mesoporous silica nanocomposite microneedle patch ScienceDirect Schematic figure about the effect of 5? reductase on the conversion of Download Scientific Diagram 5 reductase inhibitors in benign prostatic hyperplasia and prostate cancer risk reduction ScienceDirect