The first of Regen Hair Regrowth Review these, minoxidil, is the only FDA-approved male pattern hair loss treatment available for over-the-counter purchase in its weaker concentration. It is sold as Rogaine ointment, with 2% concentration of mioxidil; the stronger 5% Rogaine requires a prescription, and both varieties must be applied daily. The milder form of Rogaine has been approved for both men and women; the 5% concentration is appropriate only for use in male pattern hair loss.The second of the FDA-approved male pattern hair loss treatments, finesteride, is taken in pill form and available only as a prescription item. Its trade name is Propecia, and because it is known to cause birth defects, it's not available for women. Propecia must also be taken daily.While both Rogaine and Propecia have been effective in re-growing some hair in about half of those using them as male pattern hair loss treatments, the re-growth is maintained only as long as their users continue taking them. Those who start using them as male pattern hair loss treatments must be willing to keep using them daily on a permanent basis.