Pharmacology General 201b87fa All of the following are true about Ondansetron except? A Drug of choice for chemotherapy induced vomiting B Dopamine antagonist C 5HT3 antagonist D Acts on CTZ High-Yield Explanation Ans. is 'b' i.e., Dopamine antagonist Ondansetron is 5-HT3 receptor antagonist at CTZ and NTS, as well as in GIT.