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': 'Which of the following Inhibits theophylline metabolism? \nSelect and explain. \nA. INH, B. Griseofulvin, C. Prednisolone, D. Ciprofloxacin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Plasma concentration of theophylline, warfarin is increased by enzyme inhibitors like ciprofloxacin (also by norfloxacin and pefloxacin) due to inhibition of metabolism: toxicity of these drugs can occur. ESSENTIALS OF MEDICAL PHARMACOLOGY 6TH EDITION KD TRIPATHI Page No:689', 'role': 'assistant'}]