Hepatotoxicity related to antirheumatic drugs.

Antirheumatic agents are among commonly used drugs associated with adverse hepatic reactions. Sulfasalazine and azathioprine are among the most important causes of acute hepatotoxicity. Because such a large number of people take NSAIDs, even the rare occurrence of hepatotoxicity from these agents might contribute substantially to the total burden of drug-induced liver disease. A wide spectrum of hepatotoxic effects is described with antirheumatic drugs. Studies investigating genetic susceptibility to diclofenac hepatotoxicity have expanded our understanding of the potential drug-specific, class-specific and general factors involved in its pathogenesis, and methotrexate-associated liver disease demonstrates the interaction between drug, host and environmental factors that determines the likelihood and magnitude of liver disease. Infliximab therapy is associated with typical drug-induced autoimmune hepatitis. Although validated causality assessment methods have been used to objectively assess the strength of the association between a drug and a clinical event, in practice the diagnosis of drug-induced liver injury (DILI) involves a clinical index of suspicion, pattern recognition, the establishment of a temporal relationship between drug exposure and the adverse event, and the exclusion of alternative explanations for the clinical presentation. Detailed understanding of genetic and environmental factors underlying an individual's susceptibility would enable risk reduction and potentially primary prevention of hepatotoxicity.