title: Potential Interaction between clopidogrel and proton pump inhibitors.
abstract: Clopidogrel is widely used in patients with acute coronary syndromes and following percutaneous coronary intervention with stent implantation. The antiplatelet action of clopidogrel is felt to be of critical importance for the reduction of abrupt thrombotic occlusion of stents, particularly with drug-eluting devices. When clopidogrel is used alone or in combination with aspirin (acetylsalicylic acid), the benefits of antiplatelet therapy must be weighed against the potential for serious bleeding, particularly gastrointestinal (GI) bleeds. To minimize the risk of GI injury, proton pump inhibitors (PPIs) are considered the drugs of choice. However, a growing body of evidence suggests that PPIs may adversely interact with clopidogrel, diminishing the antiplatelet effect. Although the current evidence remains controversial, the potential for increased risk of thrombotic complications warrants cautious use of this drug combination until further research can determine the extent of this interaction and whether it is a drug-class effect.
authors.affiliation: School of Pharmacy, The University of Kansas Hospital and Medical Center, Kansas City, Kansas, USA. phoward@kumc.edu
authors.forename: Patricia A
authors.initials: PA
authors.lastname: Howard
authors.forename: James L
authors.initials: JL
authors.lastname: Vacek
mesh_terms: D054058:Acute Coronary Syndrome / Q000188:drug therapy; D000077144:Clopidogrel; D003328:Coronary Thrombosis / Q000517:prevention & control; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced; D006801:Humans; D015539:Platelet Activation / Q000187:drug effects; D010975:Platelet Aggregation Inhibitors / Q000008:administration & dosage* / Q000493:pharmacokinetics; D017410:Practice Guidelines as Topic; D054328:Proton Pump Inhibitors / Q000008:administration & dosage* / Q000009:adverse effects*; D013988:Ticlopidine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000493:pharmacokinetics; D016896:Treatment Outcome
chemical_list: D010975:Platelet Aggregation Inhibitors; D054328:Proton Pump Inhibitors; D000077144:Clopidogrel; D013988:Ticlopidine