Stop Running Around Or I'll Get My Pen!

I was just talking with my friend on the phone (the one I visited a couple months ago). We wrapped up our conversation something like this:

Me: Tell [your son] I said "Hi"
Friend [to son]: Jay says "Hi"
Son: To who?

One other thing we talked about was food allergies. Her son has several and they are severe enough that she has an Epi-pen nearby all the time.

After I got off the phone, I was trying to think of what's in an Epi-pen* but I couldn't think of any "epi-" word except epidural which I knew was wrong. Then I thought of some of my friends' stories about their kids, stories about my nephews and thought "Hmm, maybe an epidural pen wouldn't be such a bad idea." :)

* - It's epinephrine, BTW.