i was feeling absolutely fine pre-diabetic even though my blood sugar had gone to 7.6. I had to start Metformin 1 x 500 mg a day. It was changed to slow-release a week later due to ill effects and I felt fine. Following instructions I took two x 500 mg a day. After a few days I was weak, felt ill and by nightfall was staggering and reeling (no alcohol!) I reported to my GP, after waiting a week for a phone consultation. He told me that in that case I must double up to 4 x 500 mg a day! I have delayed this, because Metformin makes me so feel exhausted all day, unable to function to do household chores properly, let alone exercise. I am considering stopping Metformin and going on to a strict regime of low-carb and exercise. Anything to avoid medication. Does anybody else relate to this? Stopped Metformin and is doing well?