<p>The most frequent reported adverse reactions are ectopic beats, nausea, vomiting, tachycardia, anginal pain, palpitations, dyspnoea, headache, hypotension, hypertension and vasoconstriction. Other less frequent adverse reactions are aberrant ventricular conduction, bradycardia, piloerection, mydriasis, widened QRS complex, azotaemia and elevated blood pressure. Peripheral ischemic gangrene in patients with pre-existing vascular disease. Fatal ventricular arrhythmias have been reported on rare occasions.</p>