ACE INHIBITORS, ALCOHOL, ANABOLIC STEROIDS, ASPIRIN, BETABLOCKERS, GUANETHIDINE, SOME MAOIS, SOME TETRACYCLINES, AND TRICYCLIC ANTIDEPRESSANTS DECREASE INSULIN REQUIREMENTS. SOME CALCIUM-CHANNEL BLOCKERS, CORTICOSTEROIDS, DIAZOXIDE, LITHIUM,THIAZIDE DIURETICS, AND THYROID HORMONES INCREASED INSULIN REQUIREMENTS. CYCLOPHOSPHAMIDE, ISONIAZID, AND ORAL CONTRACEPTIVES INCREASED AND DECREASED INSULIN REQUIREMENTS.