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': 'Drug of choice for cheese reaction is \nSelect and explain. \nA. Prazosin, B. Phentolamine, C. Pentazocine, D. Phenoxybenzamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Phentolamine is the drug of choice in CHEESE REACTION It is a rapidly acting alpha blocker with sho duration of action (in minutes). It is non selective alpha blocker therefore blocks both alpha 1 and 2 Non Selective a Blockers Selective a1 Blockers Irreversible - Phenoxybenzamine - Used for pheochromocytoma Reversible - Phentolamine, Tolazoline,ergotamine - DOC for cheese reaction and clonidine withdrawal Prazosin Terazosin Doxazosin Alfuzosin - These drugs are used for BHP and HTN. - Also used for scorpion sting', 'role': 'assistant'}]