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Nabumetone in elderly patients with osteoarthritis: economic benefits versus ibuprofen alone or ibuprofen plus misoprostol.

Nonsteroidal anti-inflammatory drugs (NSAIDs) vary in their potential to produce gastropathy. We compared the 3-month direct medical costs, including those associated with treating NSAID-induced adverse events, of nabumetone, ibuprofen, or ibuprofen plus misoprostol in 171 elderly patients with osteoarthritis. Total direct medical costs per patient treated were $US183 for nabumetone, $US252 for ibuprofen, and $US270 for ibuprofen plus misoprostol. Differences resulted from higher costs associated with treatment of drug-related adverse events with ibuprofen, and higher drug acquisition prices with the combination regimen. Sensitivity analyses demonstrated that direct costs with nabumetone approached those for the other 2 regimens if the price of nabumetone increased by 60%, the probability of lesion formation with nabumetone increased 4-fold, the probability of a lesion greater than 0.5cm being symptomatic and needing treatment was 31%, or the price of misoprostol decreased by 50%. Although this study found more lesions because of mandated endoscopies than might be recognised or treated in clinical practice, the results suggest an economic benefit of nabumetone.