Final answer:
An antidote is a drug that contracts poisons and their effects selectively by binding with the toxin to inhibit further absorption.
Step-by-step explanation:
The drug that contracts poisons and their effects selectively by binding with the toxin to inhibit further absorption is called an antidote.
An antidote is a substance that can counteract the effects of a specific toxin or poison. It works by binding to the toxin and preventing it from causing harm to the body.
For example, atropine is the standard anticholinergic drug used as an antidote to manage the symptoms of nerve agent poisoning. It acts as an antagonist to muscarinic acetylcholine receptors, blocking the effects of excess acetylcholine.