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': 'Nitroglycerine causes all except - \nSelect and explain. \nA. Hypotension and bradycardia, B. Methemoglobinemia, C. Hypotension and tachycardia, D. Vasodilatation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Hypotension and bradycardia Nitrates effect on BP & HRo Nitrates cause vasodilatation that results in: Hypotension Reflex tachycardia (not bradycardia) o Due to hypotension (caused by vasodilatation) there is reflex sympathetic stimulation --> stimulation of b1 receptor on hea --> tachycardia.", 'role': 'assistant'}]