ASA ændrede ikke på, at clopidogrel hæmmer den trombocytaggregation, som ADP inducerer,, men clopidogrel forstærkede virkningen af ASA den trombocytaggregation som kollagen inducerer.
ASA did not modify the clopidogrel-mediated inhibition of ADP-induced platelet aggregation, but clopidogrel potentiated the effect of ASA on collagen-induced platelet aggregation.