Not to be used in IDDM; patients w/ heart failure, dehydration, acute or chronic alcoholism, or any other condition, likely to predispose to lactic acidosis. Not to be treated w/ metformin when patient plans to become pregnant & during pregnancy. Not recommended during breastfeeding.
GI adverse effects w/ anorexia, nausea, & vomiting; impaired absorption of various substances including vit B12. Metallic taste & wt loss. Hypoglycemia. Lactic acidosis (particularly those w/ renal impairment).
Increased risk of hypoglycaemia w/ other drugs that lower blood glucose conc. Reduced effect w/ drugs that increase blood glucose conc. May increase risk of lactic acidosis as well as hypoglycaemia w/ alcohol. Care should be taken if given concomitantly w/ drugs that may impair renal function.