This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
The following drug antagonizes the visceral side effects of neostigmine used for reversal of vecuronium blockade: 
Select and explain. 
A. Atropine, B. Nicotine, C. Pilocarpine, D. Pyridostigmine
A: Atropine
Answer: A: Atropine 
Explanation: Atropine or glycopyrolate is used with neostigmine to prevent muscarinic side effect of neostigmine Anticholinergic drugs (e.g. atropine, glycopyrrolate) are routinely administered with anticholinesterases in order toattenuate the undesirable muscarinic effects. Glycopyrrolate is used as a pre-anesthetic agent for reducing the secretions.