Metrizoic acid is a pharmaceutical drug that was used as an iodinated contrast medium for X-ray imaging. Its uses included angiography (imaging of blood vessels and heart chambers) and urography (imaging of the urinary tract), but its approval for use has been discontinued in the United States by the FDA.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.