Mepacrine poisoning

Bephenium is a broad-spectrum intestinal anthelmintic agent used to treat hookworm, roundworm, and whipworm infections, with greater efficacy against hookworm. Poisoning most often results from accidental ingestion of large doses. In the presence of cardiac disease or potassium deficiency, even therapeutic doses may occasionally cause severe reactions, including Adams-Stokes syndrome. Concurrent use with digitalis, chloroquine, or antimony preparations may also readily induce cardiotoxic reactions.