Most common (>=2%) Atypical sensations, tingling, dizziness/vertigo, warm/hot sensation, burning sensation, feeling of heaviness, flushing, weakness, neck pain/stiffness, chest discomfort, drowsiness/sedation
Serious Myocardial ischemia/infarction, arrhythmias, cerebrovascular events, vasospasm reactions, serotonin syndrome, increase in blood pressure, hypersensitivity reactions, seizures
Postmarketing Hypotension, palpitations, dystonia, tremor