title: Letter: Clinical comparison of flavoxate and phenazopyridine.
mesh_terms: D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D005419:Flavonoids / Q000627:therapeutic use*; D006801:Humans; D010621:Phenazopyridine / Q000627:therapeutic use*; D010880:Piperidines / Q000627:therapeutic use; D011725:Pyridines / Q000627:therapeutic use*; D012107:Research Design
chemical_list: D005419:Flavonoids; D010880:Piperidines; D011725:Pyridines; D010621:Phenazopyridine