Chymodiactin Postmarketing Surveillance

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Abstract
Postmarketing surveillance data on 29,075 patients who received Chymodiactin (Smith Laboratories' formulation of chymopapain) intradiscal injections for a herniated lumbar intervertebral disc are summarized and tabulated. The serious adverse reactions reported include death, anaphylaxis, paraplegia, and discitis. Similar problems also have been reported for Disease (Baxter-Travenol's formulation of chymopapain). Of 11 deaths reported following Chymodiactin administration, only 3 appear to be related to the drug or procedure. Two of these three were due to anaphylaxis and the third to bacterial discitis with resultant meningitis. Paraplegia appeared to be primarily due to needle trauma or injection of contrast agent and enzyme into the subarachnoid space. Careful patient selection and needle placement are essential for avoiding serious problems.

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