Additionally, does this only happen to us or is it prevalent across the animal kingdom?
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[To protect our teeth and esophagus](https://www.sciencefocus.com/the-human-body/why-do-we-drool-before-being-sick/). Stomach acid has a pH of 2, it is highly acidic. The extra saliva protects our esophagus and teeth enamel from the acid.
It also appears the [dogs do this too.](https://dogdiscoveries.com/dog-health/why-do-dogs-drool-before-vomiting#:~:text=Many%20dogs%20drool%20before%20vomiting,excessive%20saliva%20before%20throwing%20up)
Edit: the gag reflex is also governed by the medulla oblongata. Our “Lizard Brain” that is like 500 years old. It’s found in fish and lizards as well as mammals. So ima guess a lot of animals (who can) salivate do so before vomiting.
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