Well actually i heared that if u started using these medecations and if it worked and ur hair starts to grow normally ,,,u have to keep using it for the rest of ur life if u ever stopped ur hair will start fallin again and u'll lose all ur effort,ur money and eventually ur hair[b4 using the big3 u gotta b sure that u will use it for the rest of ur life]....................................if anyone know anything else just tell