noun
A drug that causes numbness or loss of sensation; often used in medical contexts. The cross-reference 麻酔薬 is a more formal medical term.
See also: 麻酔薬
歯医者でしびれ薬を打たれた。
I was given an anesthetic at the dentist.
このしびれ薬は塗ってから数分で効いてくる。
This anesthetic starts working a few minutes after application.