Allergen Immunotherapy

What is Allergen Immunotherapy?

Allergies are caused by an overactivity of the immune system to substances or allergens, such as pollens, house dust mites, animal dander, or venom allergen from insect stings (bees or wasps). Allergen Immunotherapy is a treatment in which the allergen is given in order to suppress these unnecessary reactions.

What kind of immunotherapy is available?

Allergen Immunotherapy is usually given by injections under the skin (Subcutaneous Immunotherapy). The injections are given weekly at the hospital for 2-3 months, followed by every 4-6 weeks for three years.

What are the side effects of the treatment?

The treatments can lead to local side effects, such as itchiness and swelling. Serious reactions, such as difficulty breathing, faintness, or sickness (anaphylaxis) are rare (approximately once in every 1,000 injections) and mostly occur within 30 minutes of the dose. A 60 minute observation period after each injection is obligatory.

How good is the response to treatment?

Most people respond very well to treatment with a reduction of symptoms and medication use. Not every allergic patient may be suitable for Allergen Immunotherapy, therefore, individual assessment is crucial.  This particular treatment is mainly given for Allergic Rhinoconjunctivitis (including severe hay fever) and life-threatening reactions to insect stings. Symptomatic treatment may still be required, and patients with insect allergies should continue carrying an adrenaline injector device.