Why do drug overdoses usually result in foamy mouths?
In: Biology
They don’t, that’s a movie thing. People can sometimes have drooling/gurgling if they’re too sleepy to manage their saliva. There are a few poisons that can cause increased salivation, but those are not things you’d be likely to get in recreational drugs.
The dramatic foaming and bubbling at the mouth is mostly a visual thing done for TV and movies so the viewer knows right away that someone was poisoned.
From Google: An opioid overdose can cause pulmonary edema, a fluid leak that fills up the air spaces of the lungs. This fluid can cause foaming at the mouth.
In real life it’s not mouth fluid it’s lung fluid. And it doesn’t happen immediately, the lungs start making fluid and the person doesn’t have the ability to cough it up.
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