先せん発ぱつ医い薬やく品ひん

noun

original drug; originator drug; brand-name drug

Pharmaceutical term for a drug that was first developed and marketed, as opposed to a generic copy. Used in medical, regulatory, and business contexts.

• 先せん発ぱつ医い薬やく品ひんの特とっ許きょが切きれると、後こう発はつ医い薬やく品ひんが発はつ売ばいされる。

  When the patent on the original drug expires, generic drugs are released.