what is minoxidil

Minoxidil is a medication used to stimulate hair growth and to slow balding. It is most effective for people under 40 years of age whose hair loss is recent. Minoxidil belongs to a class of drugs known as vasodilators, which means it widens blood vessels and increases blood flow. It is not known exactly how minoxidil causes hair growth. Minoxidil is available in both oral tablet form and over-the-counter as a topical liquid or foam. The foam and 2 percent minoxidil solution are used to help hair growth in women with thinning hair, while the 5 percent solution is used for male pattern baldness. Minoxidil must be used indefinitely for continued support of existing hair follicles and the maintenance of any experienced hair regrowth. It is important to follow the directions on the package or prescription label carefully, and to ask your doctor or pharmacist to explain any part you do not understand. Exceeding the recommended dosage does not produce greater or faster hair growth and may cause increased side effects. Minoxidil is generally well-tolerated, but possible side effects include scalp irritation, unwanted hair growth on other parts of the body, and low blood pressure.