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What about Primatene Mist inhaler? Available OTC, 0.125 mg of epinephrine per spray.

Haven't heard of that one. But neffy uses 3 mg of epinephrine.

Whoa, I had no idea epinephrine was OTC! 0.125mg per spray but 160 sprays per bottle. I guess 25 sprays would be a bit much all at once...

That also assumes you need the same dosage via the lungs as via the nose