Twenty-four of the 496 patients treated with omnipaque 24 had both allergic history and adverse reaction to iodine contrast media, showing significant difference(P<0.0001).

This paper reports a randomized double-blind clinical trial of two kinds of X-ray contrast media, Isovist 280 (30 cases) and Omnipaque 300 (28 cases), for cerebral angiography in 58 patients.