Avoid abrupt w/drawal in patients w/ ischaemic heart disease; HTN or angina pectoris & accompanying heart failure. DM w/ large fluctuations in blood glucose values, hypoglycemia, strict fasting, ongoing desensitisation therapy, 1st-degree AV block, Prinzmetal's angina, peripheral arterial occlusive disease; IDDM, severe renal or hepatic impairment, restrictive cardiomyopathy, congenital heart disease, haemodynamically significant organic valvular disease, MI w/in 3 mth; bronchial asthma or other COPD; existing or history of psoriasis, phaeochromocytoma. May mask thyrotoxicosis symptoms. Patients on general anaesth therapy & myocardial ischemia during induction & intubation & post-op period. May affect ability to drive or operate machinery. Pregnancy & lactation. Childn.