NCIt definition : The chloride salt form of oxybutynin, a tertiary amine and anticholinergic agent with
antispasmodic activity. Oxybutynin chloride exerts its antimuscarinic effect on bladder
smooth muscle by blocking muscarinic receptors in smooth muscle, thereby inhibiting
acetylcholine binding. This results in a relaxation of bladder smooth muscle, a reduction
of involuntary muscle contractions and delays the initial desire to void.;