Pharmacology Dryness of mouth caused by antipsychotic drug is caused by blockade of: A Muscarinic ACh receptors B GABA receptors C Serotonergic receptors D Dopaminergic receptors 💡 Explanation Dryness of mouth caused by antipsychotic drug is caused by blockade of: ✓ Correct Answer: A. Muscarinic ACh receptors