NCIt definition : The meglumine salt form of iothalamate, an organic iodine compound and a radiographic
contrast medium. Iothalamate meglumine blocks x-rays as they pass through the body,
thereby allowing body structures not containing iodine to be visualized. The degree
of opacity produced by iothalamate meglumine is directly proportional to the total
amount of the iodinated contrast agent in the path of the x-rays. The visualization
of body structures is dependent upon the distribution and elimination of iothalamate
meglumine. (NCI05);