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Many trials have indicated that individual selective cyclooxygenase (COX)-2 inhibitors lower risk for gastrointestinal complications and ulcers compared with nonselective nonsteroidal anti-inflammatory drugs (NSAIDs). Although some of these head-to-head trials have been very large, researchers have never performed a large trial to evaluate the effects of COX-2 inhibitors as a drug class.
To address this gap, investigators with the Cochrane Collaboration performed a systematic review of data from head-to-head trials of individual COX-2 inhibitors (celecoxib, rofecoxib, etoricoxib, valdecoxib, or lumiracoxib) versus nonselective NSAIDs or placebo. An extensive literature search identified 69 randomized controlled trials (some unpublished) in w…