Anaphylactic shock is by far the greatest potential risk associated with some types of allergy tests (e.g., skin tests, food tests).

Anaphylaxis is a rare, severe allergic reaction affecting two or more body systems. The condition often begins immediately after an individual has been exposed to a particular allergen. Without prompt emergency treatment, anaphylaxis can quickly progress to life-threatening anaphylactic shock, which is characterized by difficulty breathing and a dangerous drop in blood pressure. In such cases, an emergency dose of epinephrine (adrenaline) is necessary to reverse these symptoms and potentially to save the patient’s life.

Patients should contact a physician immediately if any of the following symptoms develop after allergy testing:

• Fever
• Dizziness or lightheadedness
• Wheezing
• Shortness of breath
• Severe swelling (angioedema) and/or itching