title: Bilateral guaifenesin ureteral calculi.
abstract: We report on a patient with bilateral ureteral calculi composed of guaifenesin metabolite as determined by infrared spectroscopy. These stones may be associated with excessive guaifenesin intake related to the current popularity of ephedrine preparations.
authors.affiliation: Division of Urology, Southern Illinois University School of Medicine, Springfield, Illinois 62794-9665, USA.
authors.forename: Chris
authors.initials: C
authors.lastname: Whelan
authors.forename: Bradley F
authors.initials: BF
authors.lastname: Schwartz
mesh_terms: D000328:Adult; D004338:Drug Combinations; D004809:Ephedrine / Q000008:administration & dosage / Q000009:adverse effects; D006140:Guaifenesin / Q000008:administration & dosage / Q000009:adverse effects* / Q000032:analysis; D006417:Hematuria / Q000209:etiology; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology; D008297:Male; D013055:Spectrophotometry, Infrared; D019966:Substance-Related Disorders / Q000150:complications; D014514:Ureteral Calculi / Q000139:chemically induced* / Q000737:chemistry / Q000150:complications / Q000601:surgery; D018666:Ureteroscopy
chemical_list: D004338:Drug Combinations; D006140:Guaifenesin; D004809:Ephedrine