頓とん用よう

noun, noun which may take the genitive case particle 'no', noun or participle which takes 'suru', transitive verb

single use; single dose; one-off use

Medical term for a medication taken as a single dose or used only once, as opposed to regular administration.

• この薬くすりは頓とん用ようで、症しょう状じょうが出でたときだけ服ふく用ようしてください。

  This medicine is for single use; please take it only when symptoms appear.

• 医い師しは頓とん用ようとして鎮ちん痛つう剤ざいを処しょ方ほうした。

  The doctor prescribed a painkiller as a one-off dose.