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Changes in Practice Patterns of Clopidogrel in Combination with Proton Pump Inhibitors after an FDA Safety Communication

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  • Annie Guérin
  • Reema Mody
  • Valerie Carter
  • Charles Ayas
  • Haridarshan Patel
  • Karen Lasch
  • Eric Wu

Abstract

Objectives: In 2009, the FDA issued a warning that omeprazole–a proton pump inhibitor (PPI)–reduces the antithrombotic effect of clopidogrel by almost half when taken concomitantly. This study aims to analyze the impact of the FDA Safety Communications on prescribing clopidogrel together with PPIs. Methods: This retrospective study identified clopidogrel users from the Truven Health Analytics MarketScan Databases (01/2006–12/2012). Rates of clopidogrel-PPI combination therapy were estimated in 6-month intervals for patients with ≥1 clopidogrel prescription fill, then were analyzed pre- and post-safety communication (11/17/2009). Analyses were also conducted by grouping PPIs into CYP2C19 inhibitors (omeprazole and esomeprazole) and CYP2C19 non-inhibitors (pantoprazole, lansoprazole, dexlansoprazole, and rabeprazole). Results: Overall, 483,074 patients met the selection criteria; of these, 157,248 used a clopidogrel-PPI combination. On average, 30.5% of patients in the pre- and 19.9% in the post-communication period used a clopidogrel-PPI combination therapy. Among clopidogrel users, the probability of using clopidogrel-PPI combinations fell by over 40% in the post-communication period (OR = 0.57; p

Suggested Citation

  • Annie Guérin & Reema Mody & Valerie Carter & Charles Ayas & Haridarshan Patel & Karen Lasch & Eric Wu, 2016. "Changes in Practice Patterns of Clopidogrel in Combination with Proton Pump Inhibitors after an FDA Safety Communication," PLOS ONE, Public Library of Science, vol. 11(1), pages 1-13, January.
    • Handle: RePEc:plo:pone00:0145504
    DOI: 10.1371/journal.pone.0145504
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