This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
[{'content': 'Which of the following agents scan cause recurrent fall in elderly patient with postural hypotension: \nSelect and explain. \nA. Methoxamine, B. Prazosin, C. Metformin, D. Acarbose', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: Goodman & Gillman 13th ed. P 208-209)Prazosin is one of the non-selective alpha 1 antagonists used for treatment of hypertension and BPH.DOC for HTN + BPH: PrazosinDOC for BPH: Silodosin (selective a1a agonist)Side effect:# Marked Postural hypotension (orthostatic/first dose hypotension), syncope - can cause recurrent falls. Therefore, it is given at bedtime# Retrograde ejaculation', 'role': 'assistant'}]