Risk of sudden collapse following initial dose. Patients w/ renal or hepatic impairment; angina pectoris. May cause drowsiness or dizziness; do not drive or operate machinery. Elderly.
Enhanced hypotensive effects w/ diuretics, other antihypertensives, alcohol & other hypotension-causing drugs. Increased risk of 1st-dose hypotension w/ β-blockers or Ca channel blockers.