<p>Tegaserod is a serotonin type-4 (5HT4) receptor partial agonist. Tegaserod&nbsp;binds with high affinity at human 5HT4 receptors, present on caudate membranes, whereas it has no appreciable affinity for human recombinant 5HT3 receptors or human recombinant dopamine D2 receptors. In vitro and animal study has revealed that Tegaserod can trigger the peristaltic reflex via 5HT4 receptor activation and thereby enhance basal motor activity and normalize impaired GI motility.</p>