Mechanism of action of oxybutynin is:-: (A) Cholinergic muscarinic receptor agonist, (B) Cholinergic muscarinic receptor antagonist, (C) Cholinergic nicotinic receptor antagonist, (D) Cholinergic nicotinic receptor agonist
Answer is B. 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.