有ゆう効こう成せい分ぶん

noun

active ingredient

Technical term used in pharmacology and related fields to refer to the component of a drug or product that produces the intended effect.

• この薬くすりの有ゆう効こう成せい分ぶんはアセトアミノフェンです。

  The active ingredient in this medicine is acetaminophen.

• 化け粧しょう品ひんの有ゆう効こう成せい分ぶんを確かく認にんしてください。

  Please check the active ingredients in the cosmetic product.