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You know, reading through these letters really makes me think about the fact that I carry an epi-pen and am never questioned about it. Granted, if I couldn't carry the epi I wouldn't even get on the flight as any of my allergens being triggered without me having the epi is instant death for me.
But, really, I could have any injectible gel in that epi. I can certainly overpower someone with it. If you've ever had an epi you know it packs a wollap with your heart rate and a freaky feeling.