Eli5 why do we produce a lot more saliva right before we vomit?

Question

I’m currently suffering with a nasty sickness bug and was wondering why my mouth fills with saliva right before I vomit?

NSFW just incase

In: 3025

Answer 1

I remember reading somewhere that in particular situations (drunkenness and poisoning for example) your body releases a type of enzyme into your saliva that, when consumed, induces vomiting to expel whatever it is your body thinks is poisoning you. This is why spitting out the saliva delays the onset of vomiting.