“Both … darifenacin substantially delayed [P < 0.01 vs. placebo (for both doses), P < 0.01 vs. tolterodine (for …)] small intestinal transit, i.e., colonic filling at 6 h (placebo [59.6 +/- 6.4%, mean +/- SE ], 7.5 mg ER [34.4 +/- 6.…%], 15 mg ER [20.4 +/- 6.3%)].”