Minoxidil (generic for Rogaine) was discovered in the 1980s as an effective medication for hair restoration. It is available over the counter in a 2% and a 5% solution and is known to stimulate hair growth and to decrease thinning of hair. It reverses some of the miniaturization that occurs as a person is going through the hair loss process.
Minoxidil can be used in both men and women and is thought to be more effective in women in some cases. In one study, Rogaine was shown to regrow hair in 85% of men when used twice a day (after four months). With regular use, the fine, miniaturized hair strand looks thicker and stronger.