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Allergy shots, also called allergen immunotherapy, are the only treatment that targets the cause of an allergy instead of only controlling its symptoms. By giving the responsible allergen gradually and under control, the body builds tolerance and its exaggerated response steadily decreases, leading to lasting long-term improvement.
How does immunotherapy work?
Treatment exposes the immune system to increasing doses of the identified allergen until it reaches a maintenance dose the body tolerates without reacting:
Build-up phase
Gradually increasing doses of the allergen are given, usually weekly or every two weeks, until the maintenance dose is reached. This phase usually lasts 3 to 6 months.
Maintenance phase
Once the optimal dose is reached, shots are spaced out to once a month. This phase continues for 3 to 5 years to consolidate immune tolerance.
Lasting tolerance
After completing the full course, most patients stay better for years — even decades — after treatment ends.
Which allergies is it used for?
- ✓ Allergic rhinitis — caused by dust mites, pollen, mold or animal dander.
- ✓ Allergic asthma — when the main trigger is an identified allergen.
- ✓ Allergic conjunctivitis — red, itchy, watery eyes caused by allergies.
- ✓ Insect venom allergy — bee or wasp stings with a risk of anaphylaxis.
- ✓ Atopic dermatitis — in cases with a proven allergic component.
Benefits of treatment
Targets the cause
It is the only treatment that changes allergic disease at its source instead of just masking symptoms.
Lasting improvement
The effects last for years after treatment ends, unlike medications that only work while you take them.
Prevents progression
Lowers the risk of allergic rhinitis progressing to asthma and of new sensitizations to other allergens.
Less medication
Most patients significantly reduce their use of antihistamines and other rescue medications.
Important: Immunotherapy requires the allergen to be identified first with skin or blood tests. The vaccine is prepared individually for each patient and must always be given under medical supervision.
Allergy immunotherapy in Guadalajara
Dr. Rodolfo Salazar Villa designs and supervises a personalized immunotherapy plan for each patient. The Unidad de Alergia, Asma e Inmunología Clínica has more than 30 years of experience giving allergy shots, with ongoing follow-up in Guadalajara and at Hospital Puerta de Hierro Sur.
