noun
A substance that counteracts a poison. Used in medical, toxicological, and figurative contexts.
ヘビに噛まれたので、すぐに解毒剤を注射してもらった。
I was bitten by a snake, so I was given an antidote injection right away.
この薬は特定の毒に対する解毒剤として使われる。
This medicine is used as an antidote for a specific poison.
毒消し is a more colloquial term for something that counteracts poison, often used in folk remedies or everyday speech, whereas 解毒剤 is the formal medical term.
Compound of 解毒 (detoxification) + 剤 (agent, medicine).