as needed
US /æz ˈniːdɪd/
UK /æz ˈniːdɪd/

1.
au besoin, si nécessaire
when or where necessary; as required.
:
•
Add water as needed to the mixture.
Ajoutez de l'eau au besoin au mélange.
•
The nurse will change the dressing as needed.
L'infirmière changera le pansement au besoin.