Use of non-steroidal anti-inflammatory drugs (NSAIDs) to treat first-time heart attack patients significantly increased the risk for cardiovascular and bleeding events post-heart attack in a nationwide Korean study, published in the Journal of the American College of Cardiology.
“To the best of our knowledge, this is the first population-based study to investigate the cardiovascular and bleeding risk associated with concomitant NSAIDs treatment in a non-Western population with myocardial infarction,” said the study’s lead author, Cheol Ung Choi, Korea University Guro Hospital, Korea University College of Medicine (Seoul, Korea). “Our study adds important value to the currently available evidence for concomitant NSAIDs treatment after MI by constituting global evidence that encompasses diverse population groups.”
Researchers used the National Health Insurance Service (NHIS) and the Korean Health Insurance Review and Assessment Service (HIRA), two nationwide organisations that validate healthcare services and medical costs in South Korea, to access detailed medical information of 98% of the Korean population, including a patient’s diagnosis, treatment and prescriptions.
The study enrolled 108,232 patients admitted for a first-time heart attack between 2009 and 2013, with a follow-up period of 2.3 years. The average age was 64.2 years and 72.1% were men. The researchers tracked prescriptions for antithrombotic medications (including aspirin, clopidogrel and oral vitamin K antagonist) and NSAIDs (including naproxen, ibuprofen, diclofenac, celecoxib, meloxicam and more). Among antithrombotic medications, dual antiplatelet therapy (DAPT) with aspirin and clopidogrel was the most frequently prescribed at 87.9%. Diclofenac was the most frequently prescribed NSAID in patients with either cardiovascular or bleeding event outcomes, 71.8% and 68.9%, respectively.
Cardiovascular and bleeding risk increased within seven days after patients began NSAIDs treatment. A primary cardiovascular event (including heart attack, stroke or blood clotting) developed in 26.2% of patients prescribed NSAIDs. Among the NSAIDs subtypes, celecoxib and meloxicam showed the lowest risk of cardiovascular events, with similar trends in the DAPT subgroup. Secondary bleeding events developed in 23.4% of patients. Like cardiovascular events, celecoxib, meloxicam and DAPT showed the lowest risk of bleeding events.
According to the researchers, NSAIDs treatment should be limited as much as possible after a heart attack, however the data suggests that celecoxib and meloxicam could be considered as a possible alternative choice in patients where NSAIDs prescription is inevitable. The trial demonstrated that cardiovascular risk increased significantly when patients were prescribed NSAIDs subtypes naproxen or ibuprofen.
Current guidelines discourage the use of NSAIDs in patients with established cardiovascular disease. While established in Western populations, there has been no available data to report the level of cardiovascular and bleeding risk with NSAIDs treatment in a globally diverse population of heart attack patients.
The study had several limitations, including a lack of available data for over-the-counter NSAIDs. The researchers could not assess mortality outcomes as the HIRA database did not include death certificate information. Finally, the researchers recommend the current findings be validated against neighbouring countries, including Japan and Taiwan, to examine the results in similar ethnic populations.
“The expansion of the safety issues of NSAID to a different ethnicity is of the utmost importance given that most data about NSAID were extracted from Western populations, but the risk of bleeding post-MI varies according to ethnicity,” said Juan J Badimon, professor of cardiology in the Icahn School of Medicine at Mount Sinai (New York, USA), in an accompanying editorial comment. “This study allows the generalisability of the adverse events of NSAID to all patients by constituting global evidence encompassing different population groups.”
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