Myodil Action Group (UK)

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Copies of the only known animal tests conducted by any drug producers, the documents detail a 15 week intrathecal toxicity study comparing the effect of Pantopaque I and Pantopaque II on the spinal cords of Walker Hound dogs. Pantopaque I was already being produced and marketed by Lafayette Pharmacal, Pantopaque II was developed with the hope that it would be easier to remove from the spinal cord after Myelography.  The investigation concluded that Pantopaque I and II produced granulomatis meningitis in all of the dogs. These test results were never made available to the FDA or published publicly.