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 ...
Anaphylaxis can cause severe itching, difficulty breathing, fainting, and abdominal pain. These symptoms usually begin about 30 minutes after coming into contact with an allergy trigger. First, call ...
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