Question Summary:
What is the ruling for using mouthwash whilst fasting?

Question Detail:

What is the ruling for using mouthwash whilst fasting?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salamu ‘alaykum wa-rahmatullahi wa-barakatuh.
It is Makrooh (disliked) to use mouthwash whilst fasting.
Moreover, if the mouthwash is swallowed, the fast will be nullified and Qadha of that fast will be compulsory. [1]
A Miswaak should be used instead to remove any odors from the mouth.
And Allah Ta’ala Knows Best
Ismaeel Bassa
Student Darul Iftaa
Durban South Africa
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net