Acetrizoic acid is a type of radiocontrast agent that is used during X-ray examinations, such as angiography and computed tomography (CT) scans. It is a iodinated compound that absorbs X-rays, making it possible to visualize blood vessels and other internal structures on an X-ray image.

Acetrizoic acid works by increasing the contrast between different tissues in the body, allowing doctors to see details that might otherwise be difficult to distinguish. It is typically administered through an injection into a vein or artery, depending on the type of examination being performed.

Like other radiocontrast agents, acetrizoic acid can cause side effects such as nausea, vomiting, and allergic reactions in some people. In rare cases, it may also cause more serious complications, such as kidney damage or heart problems. As with any medical procedure, the use of acetrizoic acid should be carefully monitored and administered by a qualified healthcare professional.