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': 'Bad dreams are a rare adverse effect of which of the following drug? \nSelect and explain. \nA. Atenolol, B. Prazosin, C. Nifedipine, D. Furosemide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Erectile dysfunction, impotence, bad dreams and hallucinations can be seen with beta blockers REFERENCES: KDT 6th ed pg 135-140 Goodman Gillman 12th ed pg 280-285', 'role': 'assistant'}]