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': 'Atropine causes all except: March 2012 \nSelect and explain. \nA. Bronchoconstriction, B. Tachycardia, C. Dry mouth, D. Mydriasis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A i.e. Bronchoconstriction Effects of atropine Atropine causes bronchodilatation and reduced airway resistance, especially in COPD and asthma patients The most prominent effect of atropine is to cause tachycardia Atropine markedly decreases sweat, salivary (dry mouth), tracheobronchial and lacrimal secretion (M3 blockade) Topical instillation of atropine causes mydriasis, abolition of light reflex and cycloplegia lasting 7-10 days', 'role': 'assistant'}]