“…Although most previous studies mainly focused on the effects of PPIs on CV outcomes in patients receiving clopidogrel (Kwok and Loke, 2010;Siller-Matula et al, 2010;Chen et al, 2012;Gerson et al, 2012;Kwok et al, 2013;Melloni et al, 2015;Sherwood et al, 2015;Serbin et al, 2016;Bundhun et al, 2017;Niu et al, 2017;Demcsák et al, 2018;Khan et al, 2018), the current study is the first comprehensive systematic review to examine the efficacy and safety profile of PPIs combined with DAPT in patients after PCI or ACS and is, to the best of our knowledge, the only study to evaluate the safety of PPIs with the concomitant use of other P2Y 12 inhibitors. This review of 22 studies with 6,930 patients from RCTs to 183,546 patients from observational studies showed that the use of PPIs probably reduced the risk of GI bleeding and UGI bleeding relative to no PPI use.…”