Influence of pantoprazole and esomeprazole on the anti - platelet aggregation effect of clopidogrel

Objective To determine the platelet aggregation rates before and after the usage of clopidogrel in combination with proton pump inhibitors and compare the differences of the rates of platelet aggregation in order to explore whether esomeprazole, pantoprazole will affect the anti-platelet aggregation effect of clopidogrel. Methods Two hundred patients with acute coronary syndrome were treated with dual antiplatelet aggregation therapy ( aspirin enteric - coated tablets 75 mg/d, clopidogrel after 300 mg loading dose 75 mg/d maintenance), and were divided into three groups: esomeprazole group (Esomeprazole 20 mg/d) 60 cases, pantoprazole group (Pantoprazole 40 mg/d) 60 cases and control group ( without proton pump inhibitors) 80 cases. The ADP - induced maximum platelet aggregation rates were detected by Turbidimetry on the day before and 7 days after the medication. The differences of the rate of platelet aggregation in the three groups before and after the medication and the incidence of major cardiovascular events were recorded. Results There was no significant difference in the platelet aggregation rate of the three groups,which were (26.7 ± 3.3) % in the control group, (26.5 ± 3.6) % in the esomeprazole group and (25.6 ± 2.9 ) % in the pantoprazole group. Conclusions Pantoprazole and esomeprazole do not affect the anti-platelet aggregation effect of clopidogrel. Key words: Esomeprazole ;  Pantoprazole ;  Clopidogrel ;  Platelet aggregation rate ;  Interaction ;