A member asked:

I have canker sores and got a peroxide sore mouth wash crest it says do not swallow but after u spit it out and then swallow some will still go down?

6 doctors weighed in across 2 answers
Dr. Glynis Ablon answered

Specializes in Dermatology

We do prefer swish : and spit but a small amount may be swallowed and shouldn't be a problem

Answered 7/16/2014

3.9k views

Thank
Dr. John Verville answered

Specializes in Cosmetic Dentistry

Spit as much as you: Spit as much as you can, the remaining trace amounts will not cause and problems. Hope this helps Regards jdv

Answered 9/13/2017

3.8k views

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