<prompt> All are antiemetic except ?OndansetranMetoclopramideChlorpromazineBismuth  <response>: Ans. is d i.e., Bismuth Antiemetic drugs Anticholinergics - Hyoscine, Dicyclomine. H1 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. 