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: Pediatrics
[{'content': 'After taking ceain medications an adolescent ended up in metabolic acidosis. The causative drug will be: \nSelect and explain. \nA. Acetazolamide, B. Phenformin, C. Verapamil, D. Triamterene', 'role': 'user'}, {'content': "Answer: A \nExplanation: The carbonic anhydrase inhibitor acetazolamide induces metabolic acidosis and thereby stimulates ventilation, but it is not widely used because the metabolic imbalance it produces may be detrimental in the face of respiratory acidosis. It has a very small beneficial effect in respiratory failure in COPD patients. The drug has proved useful in prevention of high altitude sickness. Ref: Barnes P.J. (2011). Chapter 36. Pulmonary Pharmacology. In L.L. Brunton, B.A. Chabner, B.C. Knollmann (Eds), Goodman & Gilman's The Pharmacological Basis of Therapeutics, 12e.", 'role': 'assistant'}]