as needed

US /æz ˈniːdɪd/
UK /æz ˈniːdɪd/
"as needed" picture
1.

必要に応じて, 必要であれば

when or where necessary; as required.

:
Add water as needed to the mixture.
必要に応じて水を加えてください。
The nurse will change the dressing as needed.
看護師は必要に応じて包帯を交換します。