Final answer:
Antiemetic drugs that are dopamine antagonists include phenothiazines such as chlorpromazine. These medications can alleviate symptoms like nausea and vomiting by blocking dopamine receptors.
Step-by-step explanation:
Antiemetic medications that are dopamine antagonists include drugs such as the phenothiazines, with chlorpromazine being a common example. These medications are able to block the effects of dopamine by binding to its receptors without activating them, which can help alleviate certain symptoms like nausea and vomiting that may be associated with overactive dopamine neurotransmission. One of the primary uses of dopamine antagonist antiemetics is in the treatment of conditions like schizophrenia and also in the prevention and control of postoperative nausea and vomiting.