Objective To study the effects and mechanisms of
paeoniflorin and glycyrrhizic acid in the regulation of gastrointestinal motility. Methods Rat circular gastrointestinal smooth muscle strips were obtained, and paeoniflorin and glycyrrhizic acid were administered to inhibited Ach stimulated contraction (i.e. induced relaxation). The effects were studied by recording changes in length isotoniclly via Biopac MP150 Lever Tranducer. The gastrointestinal smooth muscle strips were preteated wi...