Symptoms of anaphylaxis

Anaphylaxis is a systemic reaction, which means that many parts of the body are affected.

The time lapse between ingestion/or contact with the allergen and anaphylactic symptoms varies among individuals. Symptoms can appear immediately or can be delayed from 30 minutes to one hour after exposure. Symptoms may also disappear and then recur hours later. Once symptoms arise, they progress quickly.

Symptoms of anaphylaxis can vary from mild to severe and are potentially deadly. The most dangerous symptoms are low blood pressure, breathing difficulties, shock and loss of consciousness, all of which can be fatal.

Cardiovascular: Reported symptoms include, hypotension, chest pain or tightness, cardiac arrest, faint pulse and shock.

Dermatologic: Reported symptoms include, urticaria, swelling, itchy skin, sensation of warmth, reddening of the skin, flushing, angioedema and rash.

Gastrointestinal: Nausea, pain/cramps, vomiting, diarrhea, itchy mouth/throat.

Pulmonary: Histamine can induce vasodilatation of arterioles and constriction of bronchioles in the lungs, also known as bronchospasm. Other symptoms may include respiratory distress, throat tightness, hoarse voice, cough, nasal congestion, trouble swallowing, fainting, light-headedness, unconsciousness, angioedema, wheezing, respiratory arrest and death.

Other: Other possible symptoms include anxiety, hay fever-like symptoms, red/itchy/watery eyes, headache and cramping of the uterus.

This information has been edited and peer-reviewed by contributors to the Natural Standard Research Collaboration (www.naturalstandard.com).

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