I was on Metformin for many years. I began having to
upchuck every morning,, then RUN to the bathroom.
Two different doctors knew not why this was happening.
Then on Saturday morning at the dollar store I felt a tingling on top of my head. I told my wife that I had to go outside. Upchuck again. Then my lips felt funny and my wife said they were swelling. On the way to emergency
room my vision began to lose and then clear.
To make it short, 3 days and nights in the hospital.
It was Lactic Acidosis - just like the pamphlet said that comes with the meds.