Is one allowed to brush teeth on Yom Kippur with toothpaste on a toothbrush without rinsing toothbrush before and without rinsing mouth after? What if its prescription which I would think probably makes it more dangerous to swallow? (Also would there be a difference between flavors sweet vs mint?)

On kashrut.org which is based on Rabbi Abadi it's allowed but everywhere else they say it's not/not recommended. Does anyone know of any Ashkenazic sources/poskim that allow it?

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    Related: judaism.stackexchange.com/q/28648/1713 – Daniel Sep 22 '15 at 17:38
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    Welcome to Mi Yodeya, and thanks for bringing your question here! Please consider registering your account, to enable more site features, including voting. While you're at it, I suggest that you edit your profile and give yourself a name! Gemar chatima tova. – Isaac Moses Sep 22 '15 at 18:02
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    I think it has everything to do with turning a solid into a liquid. The toothpaste is solid-like to start but by the end it's water-like. – ezra Sep 26 '17 at 18:36
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    What @ezra seems to refer to is a problem of memarech - "smearing" which may be problematic with most toothpastes. The ones that are a soft gel may not be a problem. – DanF Sep 21 '18 at 20:16
  • @DanF That is exactly what I mean – ezra Sep 21 '18 at 21:20

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