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Rofecoxib, celecoxib (Celebrex), and valdecoxib (Bextra) are a subclass of nonsteroidal anti-inflammatory drugs (NSAIDs) that selectively block the enzyme COX-2 (cyclooxygenase-2). When Merck announced the rofecoxib withdrawal, it said that its study results were not necessarily applicable to others in the COX-2 inhibitor class.

The focus now shifts to COX-2 inhibitor class