The drug works by preventing the conversion of testosterone into dihydrotestosterone (DHT), which is responsible for hair loss. First, we need to understand what Propecia does. It blocks the effects of male hormones on hair growth and hair loss by inhibiting an enzyme called 5 alpha reductase. This enzyme converts testosterone into dihydrotestosterone (DHT), a hormone that causes hair loss in both men and women when it gets out of balance with estrogen levels in the body. In a new study, 90% of men who took cost cheap propecia without a prescription experienced observable results—either re-growth in hair (48%) and also hairloss reduction (42%), at an assessment involving footage as a result of an impartial block involving experts. Propecia is a medication used to combat hair loss in men. It has been said to work well for many men, but it has been known that it does not work for everyone. It is a hormone that helps the body maintain hair. If you want to know whether or not you should take this drug, your doctor will be able to tell you what dosage would be best for you.