This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
[{'content': 'Reflex bronchoconstriction is most likely to occur with the following form of inhaled antiasthma medication \nSelect and explain. \nA. Metered dose spray of drug in solution, B. Dry powder rotacap, C. Nebuliser, D. Nebuliser with spacer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dry powder inhalers are poable devices in which the capsule (rotacap) containing the drug is punctured/cut across and the powder is aerosolized by the inspiratory air flow of the patient. It requires high velocity inspiration which children, elderly and the very sick may not be capable of. Complications The dry powder is also more likely to irritate the air passage producing cough and bronchoconstriction. Ref:- kd tripathi;pg num :-232', 'role': 'assistant'}]