Since the primary cause of hair loss in men is a genetic cause of the DHT hormone, any appropriate treatment for hair loss should include an anti-DHT.
Propecia also called Finastride was the first drug approved by FDA for the treatment of hair loss. Propecia is an orally administered drug that inhibits an enzyme that converts testosterone to DHT. Propecia is only available with prescription. The drug is not recommendable for women’s treatment. It is known to be a very safe drug that has less than 2% chances of adverse effects which sometimes might include reduced sex appetite. Since 98% of DHT is produced in the hair follicle, local inhibition of DHT production yields better results and has a lower chance of possible side effects.
If you administer this treatment for a longer period of time, you will see that the effects will appear in three to four months. The most important issue that you need to know about this treatment is that it has a slower effect in the foreside of the head.