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08 April 2020 : Case report  Japan

Acute Bromide Intoxication in a Patient with Preserved Renal Function

Unexpected drug reaction

Chihiro Munekawa1BE, Tatsuya Kawasaki12ABDE*, Tomoki Miyoshi1BD, Yusuke Yamane1F, Hiroshi Okada1F, Hirokazu Oyamada1F

DOI: 10.12659/AJCR.922019

Am J Case Rep 2020; 21:e922019

Abstract

BACKGROUND: Electrolyte imbalance is frequent in many situations, but severe hyperchloremia is markedly rare in the absence of renal impairment. We report a patient with preserved renal function who exhibited severe hyperchloremia and negative anion gap.

CASE REPORT: A 70-year-old female with preserved renal function presented with fatigue and impaired consciousness. Venous blood gas analysis was notable for a chloride level of 137 mEq/L and anion gap of –18.2 mEq/L. Careful history taking revealed that she had taken bromide-containing over-the-counter painkillers. Her symptoms and laboratory tests gradually improved after intravenous hydration and painkiller withdrawal. The serum level of bromide ions on admission was later found to be 4-times higher than that considered toxic.

CONCLUSIONS: It is important to recognize that hyperchloremia with a negative anion gap strongly suggests bromide intoxication, and that bromide intoxication can develop even in patients with preserved renal function. Careful history taking is essential to the diagnosis because some over-the-counter drugs that are widely available and a few prescription drugs contain bromides.

Keywords: Acid-Base Equilibrium, Bromides, Chlorides, Fluid Therapy, Nonprescription Drugs, Water-Electrolyte Imbalance

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923