Dead mouse paste is an ancient Egyptian remedy that was used to treat toothaches. As effective pain medication had not yet been invented, people tried various methods to alleviate their suffering, some of which were less than pleasant or effective.
In this case, Egyptians would create a paste by mashing dead mice and mixing them with other ingredients. This concoction would then be applied to the aching tooth in an attempt to ease the pain. As one might expect, this method was far from effective and often led to further complications, such as infections.
The mouse looks disturbed too!
Marijuana works much better.