Increased hypoglycaemic effect w/ miconazole. Antabuse effect & increased risk of lactic acidosis w/ alcohol. Increased hypoglycaemic effects w/ phenylbutazone; danazol. Elevated blood glucose w/ chlorpromazine, corticosteroids (glucocorticoids), systemic & local tetracosactides, β
2-agonists. Decreased blood glucose levels w/ ACE inhibitors. Triggered lactic acidosis w/ diuretics. Renal failure w/ iodinated contrast media. Reduced efficacy w/ organic cation transporters (OCT) 1 substrates/inhibitors eg, verapamil. Increased GI absorption & efficacy w/ OCT1 inducers eg, rifampicin. Increased plasma conc w/ OCT2 substrates/inhibitors eg, cimetidine, dolutegravir, crizotinib, olaparib, daclatasvir, vandetanib. Masked some hypoglycaemic symptoms by β-blockers. Increased sulphonylurea t
½ w/ fluconazole. Reduced plasma conc w/ bosentan. Reduced antidiuretic activity w/ desmopressin. Reduced hypoglycaemic effect w/ bile acid sequestrants, colesevelam.