Which of the following statements about antiemetic medications is INCORRECT?

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Domperidone antagonizes D2 receptors in the chemoreceptor trigger zone and upper gastrointestinal tract.Domperidone can induce dystonic reactions.Ondansetron selectively targets 5-HT3 receptors.Ondansetron can induce vomiting by interacting with cytotoxic antigen receptors.

Explanation

Domperidone works by blocking D2 receptors in the chemoreceptor trigger zone and upper gut and may cause dystonia as a side effect. Ondansetron functions as a selective antagonist at 5-HT3 receptors. However, ondansetron does not cause vomiting by acting on cytotoxic antigen receptors; this statement is incorrect.