Biphasic anaphylaxis is a second anaphylactic reaction after successful treatment, without new allergen exposure. It can occur up to 72 hours later, often peaking within 8 to 11 hours. Symptoms can ...
Delayed anaphylaxis can start an hour or more after peanut exposure, sometimes days later. Symptoms include swelling, wheezing, weak pulse, hives, vomiting, and confusion. Biphasic anaphylaxis can ...
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