劇げき薬やく

noun

powerful drug; potent medicine; strong poison

Refers to a drug or chemical with very strong effects, often requiring careful handling. Can be used for both therapeutic medicines and toxic substances, depending on context.

• この薬くすりは劇げき薬やくに指し定ていされているため、医い師しの処しょ方ほう箋せんが必ひつ要ようです。

  This medicine is designated as a powerful drug, so a doctor's prescription is required.