Cardiac, resp, renal or hepatic impairment; hypovolemic or debilitated patients; fat metabolism disorder. Patients at risk of fat overload. Bradycardia. Possible risk of convulsion to an epileptic patient. Monitor signs of hypotension, airway obstruction & O
2 desaturation; blood lipid levels. May impair ability to drive or operate machinery. Pregnancy. Childn <3 yr.