Abstract
ObjectiveTo assess, from the perspective of the National Healthcare System, the efficiency of a fixed-dose combination of naproxen and esomeprazole (naproxen/esomeprazole) in the treatment of osteoarthritis (OA) compared to other NSAID, alone or in combination with a proton pump inhibitor (PPI). MethodsA Markov model was used; it included different health states defined by gastrointestinal (GI) events: dyspepsia, symptomatic or complicated ulcer; or cardiovascular (CV) events: myocardial infarction, stroke or heart failure. The model is similar to the one used by NICE in its NSAID evaluation of OA published in 2008.The total costs (€, 2012), including drug and event-related costs, and the health outcomes expressed in quality-adjusted life years (QALY) were estimated in patients with increased GI risk, aged 65 or over, for a 1-year time horizon and a 6-month treatment with celecoxib (200mg/day), celecoxib+PPI, diclofenac (150mg/day)+PPI, etoricoxib (60mg/day), etoricoxib+PPI, ibuprofen (1,800mg/day)+PPI, naproxen (1,000mg/day)+PPI or naproxen/esomeprazole (naproxen 1,000mg/esomeprazole 40mg/day). The selected PPI was omeprazole (20mg/day). ResultsNaproxen/esomeprazole was a dominant strategy (more effective and less costly) compared to celecoxib, etoricoxib and diclofenac+PPI. Celecoxib+PPI and etoricoxib+PPI were more effective.Considering a cost-effectiveness threshold of €30,000 per additional QALY, naproxen/esomeprazole was cost-effective compared to ibuprofen+PPI and naproxen+PPI with incremental cost-effectiveness ratios (ICER) of €15,154 and €5,202 per additional QALY, respectively. ConclusionsA fixed-dose combination of naproxen and esomeprazole is a cost-effective, and even dominant, alternative compared to other options in OA patients with increased GI risk
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