This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Histaminics, Subject name: Pharmacology
[{'content': 'Which of the following drug is second generation antihistaminic: \nSelect and explain. \nA. Promethazine, B. Loratadine, C. Diphenhydramine, D. Doxylamine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. LoratadineSecond generation antihistaminic drug don't enter the CNS, no anticholinergic side-effects, drugs are cetirizine, levocetirizine, loratadine, ebastine, azelastine.", 'role': 'assistant'}]