COX-2 inhibition and thrombotic tendency: a need for surveillance.

Cyclooxygenase-2 (COX-2) inhibitors belong to a new class of drugs which have anti-inflammatory efficacy similar to that of traditional non-steroidal anti-inflammatory drugs (NSAIDs), but are associated with a reduced incidence of adverse upper gastrointestinal events. Biochemical evidence that COX-2 inhibitors could promote or exacerbate a tendency to thrombosis is supported by recent results from clinical trials and case reports. Two agents in this class, celecoxib and rofecoxib, have been listed on the Pharmaceutical Benefits Scheme (PBS) for very broad indications in chronic arthropathies, suggesting that they will move into widespread community use. It is important to canvass the possibility that use of these agents could be associated with thrombotic events.