Falsely decreased vancomycin caused by rheumatoid factor: A case report.

Mai Elzieny1, Jordan A Fisher2, Matthew D Sims3

  • 1Department of Pathology and Laboratory Medicine, Corewell Health William Beaumont University Hospital, Royal Oak, MI, USA.

Summary

Rheumatoid factor can cause falsely low vancomycin levels in lab tests, leading to potential overtreatment. Prompt identification and retesting using alternative methods are crucial for patient safety and avoiding vancomycin toxicity.

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