This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sympathetic System, Subject name: Pharmacology
[{'content': 'Drugs acting on dopamine receptors are all except \nSelect and explain. \nA. Dopamine, B. Fenoldopam, C. Dobutamine, D. Haloperidol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: -Dopamine It stimulates 3 receptors Receptors Dose of Dopamine for stimulation D1 <2 mg/Kg/min b1 2-10 mg/Kg/min a1 >10 mg/Kg/min -Fenoldopam is dopamine agonist -D1 Used in hypeensive emergency -Dobutamine Does not act on dopamine receptors Mainly act on beta 1 Used in CHF -Haloperidol - typical antipsychotic with D2 blocking action', 'role': 'assistant'}]