This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pharmacology
[{'content': 'Which of the following is not used as a sedative, but causes sedation as a side effect: \nSelect and explain. \nA. Digitalis, anti-arrhythmics, B. Antihistaminics, antidepressants, C. Macrolides, D. Benzodiazepines', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Antihistaminics, antidepressants (Ref: Goodman & Gilman 10th/e p452)First generation antihistaminics cause sedation and anticholinergic side effects.Sedative action of TCAs appears immediately and these drugs (particularly clomipramine, maprotiline and bupropion) lower the seizure threshold.Benzodiazepines are used as sedative drugs', 'role': 'assistant'}]