<prompt> Tegaserod is a5HT3 antagonistD2 antagonist5HT4 agonistNK1 antagonist  <response>: Cisapride, Mosapride, Prucalopride and Tegaserod are 5HT4 agonists used as prokinetics in constipation.Tegaserod is withdrawn from market because of increased risk of myocardial infarction stroke. 