A TIMELY TOPIC: Liver toxicity remains a common problem despite adequate information for physicians and drug watch programs. The number of recent publications reporting severe drug-induced liver disease emphasizes the need for prudence. ACUTE AND CHRONIC HEPATOTOXICITY: Cases of acute drug-induced liver disease have been described for nearly all drug classes: a few examples concern hepatitis subsequent to administration of fluoxetin, acarbose, riluzole, coumarin, or orlistat. Fulminant hepatitis is fortunately an exceptional event but has been described after administration of ketoprofene, nimesulid, and clarithyromycin. Chronic liver disease has also resulted from the use of mesalazine, minocyclin or fibrates. Nevirapin prescribed for HIV infection can cause severe liver disease. OTHER AGENTS: Certain herbal agents, such as chelidoin for example, can cause cholestasis. Certain excipients can also be toxic for the liver. Ecstasy appears to be a frequent cause of sometimes severe liver disease in younger subjects.