This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Which of the following is an alpha-blocker without any effect on blood pressure \nSelect and explain. \nA. Terazosin, B. Tamsulosin, C. Prazosin, D. Doxazosin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: HL Sharma 3rd ed: Pg no:187 Tamsulosin is used to treat BPH specifically It acts only on receptors present on bladder and prostrate gland', 'role': 'assistant'}]