False-positive tests for urinary 5-hydroxyindoleacetic acid. Error in laboratory determinations caused by glyceryl guaiacolate.
D001249:Asthma / Q000188:drug therapy; D002276:Carcinoid Tumor / Q000175:diagnosis; D005189:False Positive Reactions; D006140:Guaifenesin / Q000494:pharmacology* / Q000627:therapeutic use; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine*
D006140:Guaifenesin; D006897:Hydroxyindoleacetic Acid