Adrenaline shots are epinephrine. Its a chemical that narrows blood vessels and opens airways in the lungs which can reverse severe low blood pressure, severe skin itching, hives, and other symptoms of an allergic reaction. Dont know all the limitations, but I know you can’t use epipens on anyone under like 20lbs.
As far as ODing, adrenaline WILL restart a heart, potentially, but boosting your body with that much doubles the likelihood of brain damage. Like I mentioned above, it constricts blood vessels, making it easier for your heart to pump blood when it’s restarted, but smaller tubes means less oxygen getting carried to the brain.
Its also way more than your body would normally use at once.
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