This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
[{'content': 'Which of the following drug is safe for cardiovascular patient who experience an acute attack of asthma? \nSelect and explain. \nA. Ipratropium, B. Salbutamol, C. Terbutaline, D. Formoterol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. IpratropiumInhaled beta 2 agonist are the drug of choice for terminating the acute attack of asthma. But a patient suffering from heart disease, there receptors are blocked. So the alternative treatment for acute attack can be anticholinergic or methylxanthine.', 'role': 'assistant'}]