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