Propecia is a medication that has been approved by the FDA to treat male pattern baldness. It works by reducing the amount of dihydrotestosterone (DHT) in the scalp, which is a hormone that can cause hair loss. Propecia is available in a 1mg dose and is taken orally once daily. It takes about three months to see the full effects of treatment with Propecia. The medication is most effective when used consistently for at least three months. Studies have shown that men who use Propecia can experience an increase in hair growth, as well as a decrease in hair loss. In fact, in clinical trials, up to 90% of men experienced increased hair growth after using the medication for six months. While it is not guaranteed to work for everyone, Propecia has been shown to be effective in treating male pattern baldness for many men. It is important to note that Propecia should only be taken by men and should not be used by women or children. If you are experiencing hair loss and are interested in trying Propecia, it is recommended that you speak with a healthcare professional first to determine if the medication is right for you.