[competitive serotonin type 3 receptor antagonist used in the treatment of nausea and vomiting caused by cytotoxic chemotherapy drugs; also has anxiolytic and neuroleptic properties. ( CSP )] (UMLS (NCI) C0061851) =Organic Chemical; Pharmacologic Substance ; =[GA700] ANTIEMETICS; Carbazoles; imidazole; tranquilizer; serotonin inhibitor; =ONDANSETRON HYDROCHLORIDE; ONDANSETRON 8 MG