Biphasic anaphylaxis is a recurrence of anaphylactic symptoms of an initial episode that was treated appropriately, without further exposure to the allergen, typically within 8 to 11 hours but can appear up to 72 hours later.
Biphasic anaphylaxis is a recurrence of anaphylactic symptoms of an initial episode that was treated appropriately, without further exposure to the allergen, typically within 8 to 11 hours but can appear up to 72 hours later.