<prompt> All are antiemetic except -OndansetranMetoclopramideChlorpromazineBismuth  <response>: Ans. is d i.e., Bismuth Antiemetic drugsAnticholinergics - Hyoscine, Dicyclomine.Ht antihistaminics Promethazine, cyclizine, Cinnarizine, etc.Neuroleptics D2 blockers - Chlorpromazine, Haloperidol, Droperidole etc.Prokinetics drugs - Metoclopramide, Domperidone, cisapride, Mosapride, Tegaserod.5-HT3 antagonists - Ondansetron, Granisetron.Adjuvant antiemetics - Dexamethasone, BZDs, Cannabinoids, Clonidine ephedrine. 