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
Which of the following is an alpha-blocker without any effect on blood pressure 
Select and explain. 
A. Terazosin, B. Tamsulosin, C. Prazosin, D. Doxazosin
B: Tamsulosin
Answer: B: Tamsulosin 
Explanation: 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