RESUMO
<p><b>OBJECTIVE</b>To determine the effect of proton pump inhibitor (PPI) on in-stent restenosis (ISR) in patients receiving clopidogrel therapy.</p><p><b>METHODS</b>Total 439 patients underwent percutaneous coronary intervention (PCI) were enrolled in the study,including 250 post-PCI patients discharged on clopidogrel alone and 189 patients discharged on clopidogrel with PPI. The in-stent restenosis (ISR) ratio of the patients in these two groups were observed.</p><p><b>RESULTS</b>During a mean follow-up period of (13 ± 5.9) months, the post-PCI patients discharged on concomitant clopidogrel-PPI therapy had higher risk of ISR than those discharged on clopidogrel alone (19.6% Compared with 8%, P<0.001).</p><p><b>CONCLUSION</b>Concomitant use of clopidogrel and PPI after hospital discharge would increase the risk of ISR for post-PCI patients.</p>