Pharmacology Entacapone is an anti–Parkinsonism drug. It acts by : A Agonism at dopamine receptors B Antagonism at dopamine receptors C Monoamine oxidase inhibition D Cathecol–o–methyl transferase inhibition. 💡 Explanation Entacapone is an anti–Parkinsonism drug. It acts by : ✓ Correct Answer: D. Cathecol–o–methyl transferase inhibition.