Pharmacology Most impoant receptor involved in chemotherapy induced vomiting is: A Histamine H1 receptor B Serotonin 5-HT3 receptor C Dopamine D2 receptor D Opioid m receptor 💡 Explanation Most impoant receptor involved in chemotherapy induced vomiting is: ✓ Correct Answer: B. Serotonin 5-HT3 receptor