I was taking Metformin 500MG (APOT). This brand is impossible for me to find. I now take Metformin 500MG (TEVA). This brand (TEVA) makes me sick and I have been taking it for one year and my body has not been able to adjust to it. Please help me find the (APOT) brand. It was a oblong-shaped tablet imprinted with APO500 on one side and MET on the other side. Please help me!!!!!! I have tried other brands and they make me even sicker.