Topical finasteride works by counteracting the enzyme that converts testosterone to dihydrotestosterone and causes hair loss. Clinical studies have found that men with androgenetic alopecia (aka male pattern baldness) use the drug to significantly increase their total hair count, reduce hair loss and feel satisfied with their hair growth. Finasteride, a 5α-reductase inhibitor that prevents the conversion of testosterone to DHT, is mixed with minoxidil (the active ingredient in Rogaine®), a vasodilator that improves hair follicle Blood flow and promotes hair regrowth, is a topical preparation that is effective in the treatment of male pattern baldness. Also, unlike hair transplants or oral medications, topical finasteride is non-invasive and easy to use.