Yes, immunotherapy is a highly effective treatment for severe allergic rhinitis when standard medications like antihistamines and steroid sprays fail to provide relief. Unlike other treatments that only mask symptoms, immunotherapy aims to treat the cause of the allergy by retraining the immune system. In the UK, this process involves exposing the patient to tiny, gradually increasing amounts of an allergen to build up a long term tolerance.
This treatment is typically reserved for patients whose quality of life is significantly impacted by hay fever or year round allergies. Because it requires a long term commitment and specialist supervision, immunotherapy is managed by allergy clinics rather than general practitioners. Understanding the two main types of immunotherapy available in the UK is the first step toward achieving lasting relief from severe allergic symptoms.
What we will discuss in this article
- How immunotherapy retrains the immune system to stop overreacting
- The difference between subcutaneous injections and sublingual tablets
- UK clinical eligibility criteria for starting immunotherapy
- The typical timeline for treatment and when to expect results
- The common allergens treated including pollen, dust mites, and bee venom
- Managing potential side effects and the importance of clinic supervision
- The long term success rates after completing a full course of therapy
How allergen immunotherapy works
The goal of immunotherapy is desensitisation. In a person with severe allergic rhinitis, the immune system mistakenly identifies harmless substances like grass pollen as a dangerous threat. This triggers a massive release of inflammatory chemicals. Immunotherapy introduces the allergen in a controlled way that encourages the body to produce regulatory T cells and protective antibodies instead of the antibodies that cause allergy.
Over time, this shift in the immune response means that when you are naturally exposed to the allergen in the environment, your body no longer reacts with the same intensity. In the UK, this treatment is seen as the only current method that can potentially cure the allergy rather than just managing the day to day congestion and itching.
Types of immunotherapy available in the UK
There are two primary methods used in UK allergy clinics to deliver this treatment. Both are effective, but the choice often depends on the specific allergen being treated and the patient lifestyle.
- Subcutaneous Immunotherapy (SCIT): Often called allergy shots, this involves injections under the skin of the upper arm. In the UK, these are administered in a clinic setting. Patients usually have a build up phase with weekly injections, followed by a maintenance phase with injections every four to six weeks.
- Sublingual Immunotherapy (SLIT): This involves placing a tablet or drops under the tongue daily. The first dose is taken under medical supervision in the clinic to monitor for reactions, but subsequent doses are taken at home. This is commonly used in the UK for grass pollen and house dust mite allergies.
The treatment timeline and commitment
Immunotherapy is not a quick fix. To achieve a lasting change in the immune system, a full course of treatment in the UK typically lasts between three and five years. Most patients begin to notice a significant reduction in their symptoms after the first six to twelve months of therapy.
Comparison: SCIT vs SLIT in the UK
| Feature | Subcutaneous (SCIT) | Sublingual (SLIT) |
| Administration | Injections in clinic | Tablets or drops at home |
| Frequency | Monthly (after build up) | Daily |
| Specialist Supervision | Required for every dose | Required for the first dose |
| Allergens Treated | Wide range (pollen, pets, venom) | Mainly pollen and dust mites |
| Side Effects | Local swelling at injection site | Local itching in the mouth |
| Duration | 3 to 5 years | 3 to 5 years |
To Summarise
Immunotherapy is a powerful and life changing treatment option for people in the UK suffering from severe allergic rhinitis. By gradually desensitising the immune system to specific triggers, it offers a long term solution that moves beyond simple symptom management. Whether through clinic based injections or daily tablets at home, immunotherapy provides a proven pathway to reducing allergy severity and improving overall health. While it requires a multi year commitment, the potential for a permanent reduction in allergic symptoms makes it an essential consideration for those with the most persistent and debilitating cases.
If you find that your allergy symptoms remain severe despite using all standard over the counter and prescription treatments, book an appointment with your GP to discuss a referral to an immunology or allergy specialist.
Who is eligible for immunotherapy in the UK?
Eligibility is usually restricted to those with severe symptoms that are not controlled by maximum doses of antihistamines and nasal steroids. You must have a confirmed allergy via a skin prick test or a blood test before starting.
Is immunotherapy safe?
Yes, when performed under specialist guidance. Because you are being exposed to the substance you are allergic to, there is a small risk of a severe allergic reaction. This is why the first dose of SLIT and every dose of SCIT are given in a medical setting where you are monitored for at least thirty minutes.
Does the NHS pay for immunotherapy?
Yes, the NHS provides immunotherapy for patients who meet specific clinical criteria. However, because it is a specialist treatment, there may be a waiting list for an initial assessment at a regional allergy centre.
Can children have immunotherapy?
Yes. Immunotherapy is often recommended for children with severe allergic rhinitis, as it may help prevent the development of asthma later in life. SLIT tablets are particularly popular for children as they avoid the need for regular injections.
What happens if I stop the treatment early?
If you stop before the recommended three to five year period, your immune system may not have fully desensitised, and your symptoms are more likely to return. Completing the full course is essential for long term success.
Can I still take my regular allergy meds during immunotherapy?
Yes. Especially during the first year of treatment, you will likely still need your usual antihistamines and sprays. As the therapy begins to work, your specialist will help you gradually reduce these medications.
Authority Snapshot
This article was reviewed by Dr. Stefan Petrov, a UK trained physician with an MBBS and postgraduate certifications including Basic Life Support (BLS), Advanced Cardiac Life Support (ACLS), and the UK Medical Licensing Assessment (PLAB 1 and 2). Dr. Petrov has extensive clinical experience in general medicine, surgery, and emergency care. He has worked in both hospital wards and intensive care units, performing diagnostic and therapeutic procedures. This guide follows the standard UK clinical pathways for the management of severe allergic disease and the administration of allergen immunotherapy.
