Hypersensitivity to other ACE inhibitors & dihydropyridines. Patients w/ history of angioedema associated w/ previous ACE inhibitor therapy; hereditary or idiopathic angioedema; severe hypotension; shock including cardiogenic shock; high-grade aortic stenosis; unstable angina pectoris (excluding Prinzmetal's angina), heart failure during the 1st 28 days after MI. Pregnancy (2nd & 3rd trimester).