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Case Reports
. 2001 May;42(5):682-5.
doi: 10.1046/j.1528-1157.2001.32500.x.

Felbamate urolithiasis

S P Sparagana  1 , W R Strand, R C Adams
Affiliations
Case Reports

Felbamate urolithiasis

S P Sparagana et al. Epilepsia. 2001 May.

Abstract

Purpose: To report a case of felbamate (FBM) urolithiasis.

Methods: Urographic imaging [sonography, abdominal computed tomography (CT), intravenous pyelogram, voiding cystourethrogram] and urologic procedures (cystoscopy with lithotripsy, ureteral stent) to define and capture the stones. Stone identification was by infrared spectroscopy and gas chromatography/mass spectrometry.

Results: A 15-year-old boy had painful hematuria, bilateral ureteral obstruction, and urinary retention. Kidney, bladder, and ureteral stones were found, and ureteral stent placement was required to relieve obstruction. The stone material was identified as FBM by chemical analysis. Stone formation ceased with discontinuation of FBM.

Conclusions: FBM urolithiasis can occur, and possible contributory factors include high felbamate dosage, drug polypharmacy, and risk factors for forming stones of other types. FBM urolithiasis may be heralded by crystalluria.

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