Discontinue immediately if laryngeal stridor or angioedema of the face, tongue, or glottis occurs. Include intestinal angioedema in the differential diagnosis of patients presenting w/ abdominal pain. History of angioedema unrelated to ACE inhibitor therapy. Anaphylactoid reactions in patients during treatment w/ Hymenoptera venom, those undergoing LDL apheresis w/ dextran-sulfate absorption, & those hemodialyzed using certain high-flux membranes (eg, polyacrylonitrile membranes). Dual blockade of the renin-angiotensin system. Hypotension. Agranulocytosis & bone marrow depression in patients w/ uncomplicated HTN but more frequently in those w/ renal impairment, especially if w/ collagen vascular disease. Hyperkalemia. Combination w/ K-sparing diuretics or other drugs known to raise serum K levels. Hyponatremia & SIADH. Diabetes. Non-productive, persistent cough that resolves after discontinuation of therapy. Surgery/anesth. Concomitant use w/ mTOR inhibitor (eg, temsirolimus), DPP-IV inhibitor (eg, vildagliptin) or a neutral endopeptidase inhibitor; insulin or oral hypoglycemic agents. Black patients. May impair to drive or operate machinery. Renal impairment. Hepatic impairment or progressive liver disease. Lactation. Ped patients.