Someone told me if i am on metformin, and have severe diarrhea i should stop taking it because it could cause kidney failure, is this correct, thanks ?

GI symptoms common: Gastrointestinal symptoms are not uncommon with metformin. Most people take metformin for diabetes; diabetes is one of the two leading causes of kidney failure. I imagine if one got very dehydrated with diarrhea (possible), it could result in a sudden worsening of kidney function. Perhaps that was the intended message. But do check with your doctor to be certain this applies in your case. Lgromko.