<prompt> Mechanism of action of oxybutynin is:-Cholinergic muscarinic receptor agonistCholinergic muscarinic receptor antagonistCholinergic nicotinic receptor antagonistCholinergic nicotinic receptor agonist  <response>: Oxybutynin is an anticholinergic drug used in overactive bladder. It acts by blocking M3 muscarinic receptors. It has maximum risk of causing dry mouth and other anti-cholinergic adverse effects. 