Objective: To assess the palatability of iodinated oral contrast media commonly used in abdominopelvic CT and CT colonography (CTC).Methods: 80 volunteers assessed the palatability of a 20-ml sample of a standard 30 mg ml 21 dilution of Omnipaque® (iohexol; GE Healthcare, Cork, Ireland), Telebrix® (meglumine ioxithalamate; Guerbet, Aulnay-sous-Bois, France), Gastromiro® (iopamidol; Bracco, High Wycombe, UK) and Gastrografin® (sodium diatrizoate and meglumine diatrizoate; Bayer, Newbury, UK) in a computer-generated random order.Results: Gastrografin is rated significantly less palatable than the remaining media (p,0.005). Omnipaque and Telebrix are significantly more palatable than Gastromiro.No difference existed between Omnipaque and Telebrix. 39% of participants would refuse to consume the quantities of Gastrografin required for a CTC examination compared with Telebrix (7%) and Omnipaque (9%) (p,0.05). Conclusion:Omnipaque and Telebrix are significantly more palatable than both Gastromiro and Gastrografin, with participants more willing to ingest them in larger quantities as well as being less expensive. Advances in knowledge:Omnipaque and Telebrix are significantly more palatable iodinated oral contrast media than both Gastromiro and Gastrografin, which has potential implications in compliance with both abdominopelvic CT and CTC.