Rogaine is just a brand name for minoxidil. Minoxidil can be purchased from numerous sources and in varying strengths from 2% to 5% liquid and even in a 12.5% micronized lotion. It also comes combined with Retin-A, which improves results by increasing the absorption of minoxidil. (Retin-A also apparently exerts some antiandrogenic effects over time.) MiNOxidil's name betrays its relationship to nitric oxide, an important hair growth messenger that appears to be diminished in balding scalp. Minoxidil can be helpful in pattern loss, but it is not a panacea. It is best used as part of an overall program that attacks the problem from different angles. For more information on Rogaine, please read our Rogaine Product Review.