に効く薬

風邪に効く薬、持ってない？

Do you have any medicine for a cold?

頭痛に効く薬を知らないか？

Do you know of any medicine that works for headaches?

頭痛に効く薬はありますか。

Is there any medicine that works for headaches?

昨夜書くつもりが集中できなくて集中力に効く薬欲しい？

I was going to write last night, but I couldn’t concentrate. Do you want some medication to help with focus?

— JUNO／ジュノ (2007)

風邪に効く薬はありますか。

Is there any medicine that works for a cold?

医者はこの病気に効く薬を探している。

The doctor is looking for a medicine that works for this disease.