Hi there, I assume that your product contains 2% Minoxidil,if so then you don t have to worry about. The point is that this medicine increases the blood supply to the hair follicles if you are suffering from AndroGenetic Alopecia,and due to increased blood supply the hair will not only regrow but the existing hair fall can be stopped. You should be using it regularly if you want to have the continuous results once you stop using it the hair which were refrozen by the medication can become thin and in the long term can be lost again. It has got nothing to do with hair which you had before its usage. It is said that one must use Minoxidil for at least a year to have better results and if not helping then it should be discontinued. I hope I have made your doubt clearer. Thanks and all the best.