Cisapride acts directly as a selective agonist of serotonin 5-HT4 receptor with IC50 value of 0.483 μM. And It also acts indirectly as a parasympathomimetic.
Cinitapride Hydrogen Tartrate is a gastroprokinetic agent that acts as an antagonist of the 5-HT2 receptors and as an agonist of the 5-HT1 and 5-HT4 receptors