Propecia is a drug. It is very popular in the United States of America. 9 of the ten men that tried it had a positive result. Their hair started to grow back. But this is not a result one should expect to appear tomorrow. It can take up to 1 year until anything becomes obvious. This tablet is recognized by FDA and is the number 1 treatment from baldness that is willing to guarantee you an improvement.
You can purchase this medication from the nearest drug-store or you can visit Internet pharmacies and order it online. Either way you have to remember the pill can only be bought with a prescription.