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| Trade names | Myodil, Pantopaque |
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| ECHA InfoCard | 100.002.534 |
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| Formula | C19H29IO2 |
| Molar mass | 416.343 g·mol−1 |
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Iofendylate is a molecule that was used as aradiocontrast agent, typically for performingmyelography studies. It was marketed under the trade namesPantopaque (in North America) andMyodil (rest of the world).
Iofendylate is a highlylipophilic (oily) substance and as such it was recommended that the physician remove it from the patient at the end of the myelography study, which was a difficult and painful part of the procedure. Moreover, because complete removal could not always be achieved (or even attempted by some physicians), iofendylate's persistence in the body might sometimes lead toarachnoiditis, a potentially painful and debilitating lifelong disorder of the spine.[1][2] As a result, the substance, which was used extensively for over three decades, became the subject of multiple lawsuits filed around the world.[3]
Iofendylate's use ceased when water-soluble agents suitable for spinal imaging (such asmetrizamide) became available in the late 1970s. With those substances it was no longer necessary to manually remove thecontrast agent as it would eventually be removed by the body.[4] Also, with the advent ofMRI, myelography studies are nowadays much less-frequently performed.
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