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. 2014 May;77(5):887-95.
doi: 10.1111/bcp.12239.

Usage patterns of 'over-the-counter' vs. prescription-strength nonsteroidal anti-inflammatory drugs in France

Mai Duong  1 , Francesco Salvo, Antoine Pariente, Abdelilah Abouelfath, Regis Lassalle, Cecile Droz, Patrick Blin, Nicholas Moore
Affiliations

Usage patterns of 'over-the-counter' vs. prescription-strength nonsteroidal anti-inflammatory drugs in France

Mai Duong et al. Br J Clin Pharmacol. 2014 May.

Abstract

Aims: Most risks of nonsteroidal anti-inflammatory drugs (NSAIDs) are pharmacological, dose and duration dependent. Usage patterns of prescription-only (POM) or 'over-the-counter (OTC)' NSAIDs may influence risks, but are not commonly described.

Methods: The Echantillon Généraliste de Bénéficiaires database, the permanent 1/97 representative sample from the French national healthcare insurance systems, was queried over 2009-2010 to identify usage patterns, concomitant chronic diseases and cardiovascular medication in OTC and POM NSAID users.

Results: Over 2 years, 229 477 of 526 108 patients had at least one NSAID dispensation; 44 484 patients (19%) were dispensed only OTC NSAIDs (93% ibuprofen) and 121 208 (53%) only POM NSAIDs. The OTC users were younger (39.9 vs. 47.4 years old) and more often female (57 vs. 53%); 69% of OTC users and 49% of POM users had only one dispensation. A mean of 14.6 defined daily doses (DDD) were dispensed over 2 years for OTC vs. 53 for POM; 93% OTC vs. 60% POM patients bought ≤ 30 DDD over 2 years, and 1.5 vs. 12% bought ≥ 90 DDD. Chronic comorbidities were found in 19% of OTC users vs. 28% of POM users; 24 vs. 37% had at least one dispensation of a cardiovascular drug over the 2 years.

Conclusions: Most of the use of NSAIDs appears to be short term, especially for OTC-type NSAIDs, such as ibuprofen. The validity of risk estimates for NSAIDs extrapolated from clinical trials or from observational studies not including OTC-type usage may need to be revised.

Keywords: drug-related risks; over-the-counter nonsteroidal anti-inflammatory drugs; prescription nonsteroidal anti-inflammatory drugs; usage patterns.

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