Anaphylaxis is a rare, potentially fatal allergic reaction that affects many parts of the body at the same time. The trigger may be an insect sting, a food (such as peanuts) or a medication. Symptoms may include:

☛ vomiting or diarrhea

☛ a dangerous drop in blood pressure

☛ redness of the skin and/or hives

☛ difficulty breathing

☛ swelling of the throat and/or tongue

☛ loss of consciousness.