to occur in more than one percent of patients taking gabapentin. Hypotension , angina pectoris , peripheral vascular disorder , palpitation , tachycardia , and murmur have been reported infrequently. Atrial fibrillation , heart failure , thrombophlebitis , deep thrombophlebitis, myocardial infarction , cerebrovascular accident , pulmonary thrombosis , ventricular extrasystoles