Open Access

RESIDENT’S CORNER

Spontaneous dissolution of a guaifenesin stone

Thai T. Nguyen, Bernard Fallon, Howard N. Winfield

Department of Urology, University of Iowa, Iowa City, IA, USA
Address correspondence to Dr. Howard N. Winfield, University of Iowa, Department of Urology, 200 Hawkins Dr., 3 RCP, Iowa City, IA 52242-1089 USA

Canadian Journal of Urology 2005, 12(4), 2769-2771.

Abstract

Guaifenesin is a commonly used expectorant whose use may lead to the occasional formation of guaifenesin urinary stones. We herein describe a patient who was taking 2400 mg Guaifenesin per day as part of his treatment for asthma. He had a past history of a guaifenesin stone removed ureteroscopically. His current presentation was with a 9 mm by 6 mm stone in the upper left ureter, seen on CT scan, and treated initially with a ureteral stent and hydration. After 3 weeks, the stone had disappeared, as confirmed by repeat CT scan. The genesis and treatment of guaifenesin stones is discussed.

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