Dutasteride 0.5mg, although primarily approved for prostate conditions, is widely used off-label for treating male pattern hair loss (androgenetic alopecia) in many countries. It works by inhibiting both type 1 and type 2 forms of the 5-alpha reductase enzyme, which results in a more substantial reduction in dihydrotestosterone (DHT) compared to similar drugs. Lowering DHT levels helps slow hair loss and can promote regrowth where follicles are still viable, making dutasteride a potent option for individuals with hereditary hair thinning. Studies show it is often more effective than finasteride for this purpose, and it is approved for hair loss in places like South Korea and Japan.