Pharmacology Nausea and vomiting that are associated with administration of opioid analgesic is the result of stimulation of the A Limbic system B Emetic system C Chemoreceptor trigger zone (CTZ) D Opioid receptors in G.I.T. 💡 Explanation Nausea and vomiting that are associated with administration of opioid analgesic is the result of stimulation of the ✓ Correct Answer: C. Chemoreceptor trigger zone (CTZ)