Answer
The Sunnah is to use the actual Miswaak stick itself. Using extracts of
Miswaak in toothpaste does not substitute the Sunnah use of the Miswaak
stick. It is also not prohibited to use the extracts of Miswaak in
toothpastes.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai
FATWA DEPT.