<prompt> Which of the following drug is not used for the overactive bladderDuloxetineDarifenacinOxybutyninFlavoxate  <response>: Refer Goodman and Gilman 12e 231,232 Anticholinergic drugs are indicated for overactive bladder and darifenacin, solefenacin,oxybutynin,tolterodine and fesoteradine are commonly used for this condition . 