[Clinical analysis of drug eruption due to iohexol (Omnipaque)].

We reported 7 cases of drug eruption due to Iohexol (Omnipaque) which was nonionic X-ray contrast agent without severe adverse reaction. They showed generalized edematous and erythematous plaques. The eruption appeared from 5 to 6 days after the examination when a patient had not been sensitized, or several hours after that when he/she had been already sensitized. No case showed any cross-sensitization with ionic contrast media, but some cases suggested the possibility of cross-sensitization among the nonionic contrast agents.