Can we change our spray from Minoxidil 5%, Aminexil 1.5% solution to Minoxidil 5 percent solution alone?

male ....d doc prescribed minoxidil 5 percent ,aminexil 1.5 percent solution..I wasn't happy with the results after using it for 3 months..so he prescribed me regaine(5percent minoxidil) solution ..I'm using it for 4 months ..n I'm still losing hair..my density has reduced a lot..n now I feel that the first solution is a lot better than this one..now my hairs r more thinner than my father..I still Hav thick hairs..but I Hav lost half of which I had before the treatment..I'm 22..wat should I do