Life & death
Is it possible that the epipen can fail at saving your life?
Thanks for your question. It's a good one, but I'm not really qualified to answer it. I'm not a doctor, just a lowly old beekeeper!
However, my guess is that it would unfortunately be possible for an Epipen to fail to save a life. I would guess that for a very unfortunate few, the allergic reaction might be so severe that the dosage delivered by the Epipen would be insufficient. Or perhaps it might be used to late too make a difference.
Again, just shear speculation on the part of a non-medical professional.
Perhaps a medical professional will happen upon this page and offer a qualified answer.