Like "Hi all I have type do and when I was first diagnosed I was taking 500mg twice a day and it was then increased to 2000 mg twice a day. I stayed sick just about every day. I was having stomach pain and vomiting. finally I was taken off of this and now I'm taking Insulin and Actos. My husband is on metformin and does not have any problems. He even wonder if I was just making it all up.."