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': 'A highway truck driver has profuse rhinorrhoea and sneezing. Which amongst the following drugs would you prescribe him? \nSelect and explain. \nA. Pheniramine, B. Promethazine, C. Dimenhydrinate, D. Cetirizine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It is a non-sedating second generation antihistaminic agent and is preferred for the patients requiring constant attention. It does not cause sedation or impairment of psychomotor function. Other drugs listed in the question are first generation antihistaminics.', 'role': 'assistant'}]