Lithium, Torsades de pointes-inducing medicines, NSAIDs, ACE inhibitors, other compounds causing hypokalemia, digitalis prep, baclofen, allopurinol, K-sparing diuretics, metformin, iodinated contrast media, imipramine-like antidepressants, Ca, ciclosporin, tacrolimus, corticosteroid, tetracosactide.