There is no credible evidence that doctors during the Middle Ages used roasted mouse paste to treat toothaches; such treatments are documented primarily in ancient Egyptian and Roman contexts, not medieval Europe.
During the Middle Ages, doctors used roasted mouse paste to treat toothaches.

FactVerify
Source: factverify.com
Key Evidence
Multiple credible historical sources document mouse-based remedies for toothaches in ancient Egypt and Rome but do not support their use during the Middle Ages. Medieval dental treatments differed significantly and did not include roasted mouse paste.
iansmithdental.comiansmithdental.com5 Weird Dental Treatments Throughout History
What the Evidence Shows
The claim asserts that during the Middle Ages, doctors used roasted mouse paste to treat toothaches. Breaking this down, the key components are: 1) the time period (Middle Ages), 2) the use of roasted mouse paste, and 3) its application for toothache treatment. The search results and historical sources consistently indicate that the use of crushed or powdered mice as a remedy for toothaches is documented mainly in ancient Egyptian and Roman medical practices.iansmithdental.comiansmithdental.com5 Weird Dental Treatments Throughout History
today.uic.edutoday.uic.eduPain and suffering of toothache in the Dark Ages of dentistry
For example, ancient Egyptians believed that applying dead mouse paste could relieve toothache pain, and Roman toothpaste recipes included powdered mouse brains.iansmithdental.comiansmithdental.com5 Weird Dental Treatments Throughout History However, none of the sources attribute this practice to the Middle Ages (roughly 5th to late 15th century). Instead, medieval European dental treatments were quite different and often involved herbal remedies, cauterization, or rudimentary surgical interventions.
The claim conflates ancient practices with medieval ones without evidence. Additionally, the sources note that such mouse-based treatments were ineffective or even harmful.
Therefore, the claim is inaccurate in its temporal attribution and oversimplifies historical dental practices. While unusual animal-based remedies existed in antiquity, there is no reliable documentation supporting their use by medieval doctors for toothaches.