先せん発ぱつ品ひん

noun

original drug; originator drug

Pharmaceutical term for a brand-name drug that was developed first, before generic versions. Often contrasted with 後発品 (generic drug).

See also: 先発医薬品

• 先せん発ぱつ品ひんの特とっ許きょが切きれると、後こう発はつ品ひんが市し場じょうに出で回まわる。

  When the patent on the original drug expires, generic versions enter the market.

• 医い師しは先せん発ぱつ品ひんを処しょ方ほうすることが多おおい。

  Doctors often prescribe the original brand-name drug.