Pharmacology An anti-emetic drug that also decreases acid secretion due to its action on H1 receptors is : A Promethazine B Domperidone C Metoclopramide D Ondansetron 💡 Explanation An anti-emetic drug that also decreases acid secretion due to its action on H1 receptors is : ✓ Correct Answer: A. Promethazine