Severe reactions are extremely rare with sublingual immunotherapy but can lead to a life-threatening allergic reaction known as anaphylaxis. You must know the symptoms and how to respond. Symptoms can include:
- Unusual swelling and/or tenderness at the administration site
- Swelling of the face and/or mouth
- Throat tightness
- Serious wheezing, coughing, or difficulty breathing
- Shortness of breath
- Serious, unusual nausea
- Dangerous drop in blood pressure and rapid heart rate
- Serious hives or itching of the skin
- Clammy skin
- Dizziness or faintness
- Collapsing or losing consciousness
These severe symptoms can indicate anaphylaxis, an emergency medical condition.
Most severe reactions occur within the first 30 minutes, but be watchful as severe reactions can happen at any time.