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': 'Administration of which of the following drug requires monitoring: \nSelect and explain. \nA. Lithium, B. Haloperidol, C. Diazepam, D. Acetazolamide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Lithium Therapeutic drug monitoring is the measurement of medication levels in blood. Its main focus is on drugs with a narrow therapeutic index, i.e. drugs that can easily be under- or overdosed. Examples of drugs analysed by therapeutic drug monitoring: Aminoglycoside antibiotics (gentamicin) Antiepileptics (such as carbamazepine, phenytoin and valproic acid) Mood stabilisers, especially lithium citrate Antipsychotics (such as pimozide and clozapine) Theophylline Digoxin Antiarrhythmics', 'role': 'assistant'}]