system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Epinephrine/EpiPen is used for treating anaphylaxis, so why is the panic from having an allergic reaction not enough adrenaline to treat the anaphylaxis?
gpt
EpiPens contain a much larger dose of epinephrine than our adrenal glands are capable of rapidly pumping into our blood. This higher dose overcomes the effects of anaphylaxis (lung constriction, low blood pressure)