This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following is an adverse effect of β2 agonists: \nSelect and explain. \nA. Hypoglycemia, B. Hypomagnesemia, C. Hypophosphatemia, D. Hypokalemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: β2 agonists cause a brief spell of hyperkalemia followed by hypokalemia.\nThese do not cause hypoglycemia. However, β2 blockers delays the recovery from hypoglycemia.', 'role': 'assistant'}]