Ioversol is a nonionic iodinated contrast medium (CM) that is used during a CT scan or x-ray in animal experiment. In comparison with iothalamate, ioversol has a greatly reduced propensity to stimulate the release of endothelin, from cultured cells and when injected into anesthetized rats. Ioversol produces less renal vasoconstriction than did iothalamate, in control and in USIC rats, and the development of radiocontrast nephropathy, assessed by creatinine clearance and morphologic damage to the renal medulla, is largely avoided.

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