<prompt> Which of the following drug is used for overactive bladder?DuloxetineDarifenacinOxybutyninFlavoxate  <response>: Ref:KD Tripathi pharmacology 7th edition page.no: 118 Darifenacin Solifenacin are competitive muscarinic receptor antagonists of the M3 muscarinic receptor of the bladder. Receptor blocking limits bladder contractions, and reduce symptoms of bladder irritabilityoveractivity 