... names Rogaine, Regaine, Avacor and Mintop among others now that Minoxidil is off patent) is a vasodilator medication known for its ... replaced by new, thicker hairs (in a new anagen phase). Minoxidil products involve contact with hair strands, which may cause problems ... effect, and the follicle usually shrinks again and eventually dies.Minoxidil solutions are sold under many brand names. Many high priced ...