Propecia is a medication used to treat male pattern baldness in men. It contains the active ingredient finasteride, which works by blocking the conversion of testosterone to dihydrotestosterone (DHT) in the body. DHT is a hormone that plays a role in the development of male sex characteristics and is linked to the cause of male pattern baldness. Propecia tablets are usually taken once daily, with or without food. The recommended dose is one tablet (5 mg) per day. It can be taken for as long as three months to see results, but the full effects may not be visible until after six months of treatment. It is important to note that Propecia is only intended for use in men and should not be used by women or children. In addition, it can take up to four months to see the full benefits of treatment with Propecia. If you do not see results within this timeframe, continue taking the medication as prescribed. It is also important to note that Propecia does not work for everyone and may not be effective in treating your condition. It's always good to consult your doctor before starting any new medications.