Concomitant use w/ anticoagulants may increase or reduce prothrombin time. May increase risk of hypokalemia w/ K-sparing diuretics & carbenoxolone. Metabolism of corticosteroid is increased by rifampicin, carbamazepine, phenobarb, phenytoin, primidone, aminoglutethimide, barbiturate. Antagonized hypoglycemic effect of antidiabetic agents. Concomitant use of high-dose corticosteroid w/ phenoterol, pirbuterol, reproterol, rimiterol, ritodrine, salbutamol & high-dose terbutaline may result in hypokalemia. Antagonized hypotension effect of antihypertensive drugs.