Metformin
"Was having good results with no side effects for years until the drug companies wanted to produce it at a cheaper cost. Drugs are now mostly made in India and China.  I am extremely allergic to some of the inactive ingrediants. Stomach issues, body rash, swelling and bleeding skin around the eyes and leg pain.  I am now forced to use metformin in a liquid form that is made at a local compound pharmacy to avoid impurities at a cost of $70 a month for a twice daily dose."