Are selective COX 2 inhibitors superior to traditional non steroidal anti-inflammatory drugs?
Peter Jüni, Anne WS Rutjes, and Paul A Dieppe
BMJ 2002; 324: 1287-1288.

Selective cyclo-oxygenase 2 (COX 2) inhibitors, including celecoxib (Celebrex) and rofecoxib (Vioxx), are hypothesised to have a lower risk of gastrointestinal complications than traditional non-steroidal anti-inflammatory drugs.1 In September 2000 the celecoxib long term arthritis safety study, better known as CLASS, was published in JAMA.2 This trial, widely cited and distributed, concluded that a COX 2 inhibitor was associated with a lower incidence of complications than traditional non-steroidal anti-inflammatory drugs. What was much less widely publicised were criticisms that contradicted this conclusion.