Eosinophilic exudative pleural effusion after initiation of tizanidine treatment: a case report.
In this case report, we present a 42-year-old man with history of chronic low back pain after a work-related injury. The patient failed multiple therapeutic modalities both conservative and interventional, including numerous spinal injections and placement of a spinal cord stimulator. Finally, an intrathecal morphine pump was placed to control his pain in addition to oral pain medications. The course of the treatment included adding a muscle relaxant, tizanidine (Zanaflex), to control spasms in the lower extremities. Six weeks after starting tizanidine, a large pleural effusion was noted incidentally on a computerized tomography scan of the thoracic and lumbar spine. The patient underwent work-up for the pleural effusion; all tests came back negative. Finally, a drug reaction to tizanidine was suspected. The drug was discontinued, and 4 weeks later the pleural effusion resolved.[1]References
- Eosinophilic exudative pleural effusion after initiation of tizanidine treatment: a case report. Moufarrege, G., Frank, E., Carstens, D.D. Pain medicine (Malden, Mass.) (2003) [Pubmed]
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