Adverse drug events secondary to iodinated contrast agents are of particular concern to all clinicians. Despite the availability of newer agents, the mortality rates remain unchanged. We describe a fatal adverse event secondary to use of the high osmolality agent iothalmate meglumine 30%. A 58-y-old healthy female with no previous history of drug or food allergy had cardiac arrest toward the end of the i.v. infusion of the contrast agent during a CT scan. The patient expired despite aggressive therapeutic measures.