▪ Aspirin better than placebo

▪ No evidence of greater effectiveness of high-dose aspirin compared to low-dose aspirin

▪ Aspirin plus extended-release dipyridamole (ER-DP) more effective than aspirin alone

▪ Clopidogrel more effective than aspirin alone

▪ Aspirin plus clopidogrel no more effective than clopidogrel alone, but with substantially more bleeding

▪ Aspirin plus ER-DP and clopidogrel equivalent, but slightly more bleeding with aspirin plus ER-DP