What manufacturers of clonazapam have received an ab rating from the fda?

I was getting so sick from clonazapam made from a different manufacturer until I was given Mylan's product...I feel 100 percent better...I believe that I was having an alergic reaction for 9 months and thinking that I was supposed to feel that way...I got very sick one day and then they changed the manufacturer and I feel wonderful...could I be allergic to the different makers?