Nonsteroidal antiinflammatory drugs (NSAIDs) constitute a class of pharmacologically active agents with similar therapeutic actions and side effects, despite diverse chemical structures. NSAIDs inhibit the enzyme cyclo-oxygenase and, thus, decrease inflammation mediated by prostaglandins. Toxicoses due to NSAIDs are manifested primarily by gastrointestinal upset and hemorrhage and by renal damage. Management consists of detoxification measures, in addition to supportive and symptomatic care. The article outlines the incidence, clinical toxicity, mode of action, and pharmacokinetics of nonsteroidal antiinflammatory drugs. The toxic effects of NSAIDs on individual organ systems are described, and general management recommendations for the treatment of NSAID toxicoses are presented.