Everybody here knows that the Epipen or other adrenaline source is just to let the Benadryl take effect, right? Or, at least, that’s the way it was explained to me. You do the Epipen, then take the Benadryl. The adrenaline wears off in 15 minutes, and then if the Benadryl hasn’t yet taken effect, you are still in the life-threatening emergency situation and you use the second Epipen (or other device).
I learned about this in a Wilderness First Aid class. For the purposes of the class, the patient was hours away from an emergency, so we needed to know how to handle the issue.
We were told that it’s illegal to use one person’s Epipen on another person. There was a bit of wink-winking there, because if you have a person dying in front of you, are you going to let them die, or grab the other person’s Epipen and give it to them?