Sentence: Antiplatelet therapy with dipyridamole , 100 mg q.i.d . , starting 2 days before surgery , followed by aspirin , 325 mg t.i.d . plus dipyridamole , 75 mg t.i.d . , 7 hours after surgery was assessed in the prevention of saphenous vein bypass graft occlusion .
Drug combination annotation:
[{'class': 'POS', 'spans': ['dipyridamole', 'aspirin', 'dipyridamole'], 'is_context_needed': True}]