The authors report the cases of 4 patients with jaundice following the administration of ajmaline. The disease had a pseudo- angiocholitic onset with fever, chills and pruritus in the 4 patients and abdominal pains in 2 patients. Serum transaminase activity and serum alkaline phosphatase activity were increased in the 4 patients. Blood eosinophilia was found in 3 patients. Liver lesions included predominantly centrilobular cholestasis, mild hepatocytic lesions, and portal inflammation. After the interruption of the drug administration, recovery occurred in the 4 patients. Two patients resumed the intake of ajmaline; transient hepatitis recurred in these 2 patients.