Oral Dipyridamole-Associated Circulatory Collapse.

Extended-release dipyridamole plus aspirin is widely used for secondary prevention of ischemic stroke, although the molecular pharmacodynamics of dipyridamole are not completely determined. Adverse effects of fixed-dose combination of aspirin and dipyridamole include headache, bleeding, and gastrointestinal events. Previously, intravenous infusion of dipyridamole in cardiac stress testing has been associated with cardiogenic shock and pulmonary edema. Herein, we report a case study of a 72-year-old man, presented with a transient ischemic attack who suffered a circulatory collapse after an oral dose of 200 mg extended-release dipyridamole. The possible molecular mechanisms of dipyridamole on the cardiovascular system are reviewed. This is the first case report of a circulatory collapse induced by an oral intake of dipyridamole.