Final answer:
The antidote for atropine poisoning is physostigmine.
Step-by-step explanation:
The antidote for atropine poisoning is physostigmine. Atropine is an anticholinergic drug that acts as an antagonist to muscarinic acetylcholine receptors. When someone is poisoned by atropine, physostigmine can be administered as an antidote to reverse the effects of atropine poisoning.