Treatment option

Environmental Allergy Immunotherapy

Treat the allergy, not just the symptoms.

Allergen immunotherapy gradually exposes the immune system to specific environmental allergens with the goal of reducing sensitivity over time.

How to get an assessment

Immunotherapy vials, a syringe and sublingual tablets with pollen and dust mite illustrations
The basics

What is allergen immunotherapy?

Many allergy medications help control symptoms while you take them. Allergen immunotherapy takes a different approach: it gradually exposes your immune system to allergens you are sensitive to in an effort to reduce your allergic response.

It can be used for selected patients with conditions such as:

  • Seasonal allergies
  • Dust mite allergy
  • Allergic rhinitis
  • Allergic eye symptoms
  • Some forms of allergic asthma
  • Stinging insect allergy

Allergy shots can reduce sensitivity and may provide lasting improvement for some patients.

The two forms

Allergy shots and allergy tablets

Allergy shots

Also known as subcutaneous immunotherapy or SCIT. Small amounts of allergen are given by injection. Treatment usually has two stages:

  1. Build-up

    The allergen dose is gradually increased.

  2. Maintenance

    Once the target dose is reached, injections are spaced farther apart and continued over a longer period.

Allergy tablets

For certain allergens, sublingual tablets may also be available. The tablet dissolves under the tongue and is taken according to a prescribed schedule.

Your plan

How do we decide what goes into your treatment?

Your allergist considers:

  • Your symptoms
  • Allergy testing
  • Which allergens you are exposed to
  • How severe your symptoms are
  • Whether medications are controlling them adequately
  • Other medical conditions

Not the same as food OIT and SLIT

Environmental allergy immunotherapy is different from the OIT and SLIT treatments used for food allergy. Those are covered on their own page: Food allergy immunotherapy.

Next step

Getting an assessment

Whether immunotherapy is right for you is decided at an allergist assessment.

Assessments are by referral, and patients cannot book directly. Ask your family doctor, walk-in clinic, or another healthcare provider to fax a referral to 416 850 9993. Our team reviews it and contacts you to arrange the appointment.

If you are unsure whether this service applies to you, you are welcome to ask us a question first.

Ask a question Referral form for physicians

Treat the allergy, not just the symptoms.

How to get an assessment