My pharmacist gave me two different brands of clonazepam in the same bottle. One of them made my head spin as if I was drunk, and I was so dizzy that I could not bend over without falling. I thought I was having a stroke. I have been taking this for sleep since the 1980s and had no problem. What is the difference in the brands, or could it be the fillers used? It says it is tab teva. One has a name on the pill, but the other has a number on it