Drugs that affect K levels, other antihypertensives, NSAIDs, alcohol, barbiturates, narcotics, antidepressants, baclofen, amifostine, cholestyramine & colestipol resins, anticholinergics, lithium, digitalis glycosides, antidiabetic agents, metformin, β-blockers, diazoxide, pressor amines, nondepolarizing skeletal muscle relaxants, sulfinpyrazone, allopurinol, Ca salts, amantadine, cyclophosphamide, MTX.