Final answer:
The antidote for atropine poisoning is pilocarpine, a muscarinic agonist. Atropine is used to treat symptoms of nerve agent poisoning, and pilocarpine counteracts atropine's effects by stimulating muscarinic receptors.
Step-by-step explanation:
The antidote for atropine or scopolamine poisoning is pilocarpine, which is a muscarinic agonist. Atropine, a standard anticholinergic drug, is used to manage symptoms of nerve agent poisoning by acting as an antagonist to muscarinic acetylcholine receptors. However, if atropine poisoning occurs, pilocarpine can be administered to counteract the effects of atropine by stimulating muscarinic receptors. In cases of nerve agent poisoning, atropine is used alongside an oxime like pralidoxime chloride, which reactivates the poisoned enzyme acetylcholinesterase, essential for breaking down acetylcholine.