iotroxic acid iotroxic acid iotroxic acid (trade name biliscopin), used in the form of meglumine iotroxate, is a molecule used as a contrast medium during x-rays. it is specifically used during tests looking at the gallbladder and biliary tract. it is given by slow injection into a vein. iotroxic acidclinical datatrade namesbiliscopin, othersahfs/drugs.cominternational drug namesatc codev08ac02 (who) identifiers iupac name 3-ethoxy)ethoxy]acetamido}-2,4,6-triiodobenzoic acid cas number51022-74-3pubchem cid3740drugbankdb08945chemspider3609unii84c5ptp9x6keggd01388chemblchembl1651905comptox dashboard (epa)dtxsid3048782 echa infocard100.051.726 chemical and physical dataformulac22h18i6n2o9molar mass1215.818 g·mol−13d model (jsmol)interactive image smiles o=c(nc1c(i)c(c(i)cc1i)c(=o)o)coccoccocc(=o)nc2c(i)c(c(=o)o)c(i)cc2i side effects are uncommon. they include vomiting, skin flushing, headache, itchiness, and low blood pressure. rare side effects include seizures and allergic reactions. it should not be used by those who have an iodine allergy. iotroxic acid is an iodine containing contrast media of the diionic dimer type. iotroxic acid was first made in 1976. it is on the world health organization's list of essential medicines. it is rarely used in the developed world due to the availability of magnetic resonance cholangiopancreatography (mrcp).