Rogaine

FDA Approved Drugs for Hair Loss
Minoxidil(Rogaine®)—a topical solution available over-the-counter in 2% and 5% strengths.Minoxidil is effective in some people, moderately effective in some, and ineffective in others.

When effective, minoxidil can retard hair loss and stimulate new hair growth. Its mechanism of action is not well understood. Best results with minoxidil are often achieved by combining the topical solution with hair restoration surgery.