Hard to know: The best way to prove anaphylaxis is to demonstrate elevated tryptase levels (blood test) at the time of the reaction. Often, this test is not done as symptoms and timing with suspected trigger is enough to diagnose and treat. If one suspects they have had an anaphylactic reaction (now resolved), then they should urgently discuss with a physician to see if epi prescription is needed.
Answered 8/31/2017
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