NCIt definition : A benzhydryl compound and a muscarinic receptor antagonist possessing both antimuscarinic
and antispasmodic properties. Both tolterodine and its active metabolite, 5-hydroxymethyltolterodine,
competitively blocks muscarinic receptors, thereby inhibiting acetylcholine binding.
This antagonistic action results in an increase in residual urine, reflecting an incomplete
emptying of the bladder, and a decrease in detrusor pressure, indicating an antimuscarinic
action on the lower urinary tract. The 5-hydroxymethyl metabolite appears to contribute
significantly to the therapeutic effects.;