Cardiac arrest. Acute toxicity effects on the CNS & CVS. Ventricular arrhythmia & fibrillation. Elderly & patients in poor general condition. Patients w/ partial or complete heart block; w/ advanced liver disease or severe renal dysfunction; in late stages of pregnancy; treated w/ anti-arrhythmics class III. Epidural anaesth may lead to hypotension & bradycardia. Patients w/ severe or untreated HTN, poorly controlled hyperthyroidism, ischemic heart disease, heart block, cerebrovascular insufficiency, advanced diabetes & any other condition that might be aggravated by adrenaline. Contains Na metabisulphite that may cause allergic reactions.