Allergy Treatment Escalation Ladder — From Environmental Control to Biologic Therapy
Biologic Therapy
Omalizumab, dupilumab for severe refractory disease
Allergen Immunotherapy (AIT)
SCIT injections or SLIT tablets — disease modification
Prescription Medications
Leukotriene modifiers, oral steroids (short-course), biologics
OTC Antihistamines + Nasal Steroids
Second-gen antihistamines (cetirizine) + fluticasone spray
Avoidance & Environmental Control
Reduce allergen exposure in home and workplace
Disease Modification, Not Just Symptom Suppression
Unlike antihistamines and nasal corticosteroids which only manage symptoms temporarily, Allergen Immunotherapy (AIT) fundamentally shifts the immune system's response. By exposing the patient to gradually increasing doses of the allergen, the body shifts from producing allergic IgE antibodies to protective IgG4 blocking antibodies.
Forms of Allergen Immunotherapy
- Subcutaneous Immunotherapy (SCIT): Traditional allergy shots administered at an allergist's office. The most extensively studied form with a 100+ year evidence base.
- Sublingual Immunotherapy (SLIT): Allergen extract administered as drops or FDA-approved tablets under the tongue. More convenient (can be done at home) but generally considered slightly less efficacious than SCIT for some allergens.
- Oral Immunotherapy (OIT): A breakthrough treatment for food allergies, particularly peanut. FDA-approved Palforzia has demonstrated ability to raise the reaction threshold significantly in children.
Prerequisite for immunotherapy: accurate allergen identification through allergy testing. Read our allergy research trends 2026 to learn about emerging biologic combinations with AIT.
Am I a Candidate for Immunotherapy? — Clinical Checklist
- Confirmed allergy diagnosis by board-certified allergist via skin prick or blood test
- Symptoms inadequately controlled by antihistamines or nasal steroids
- Allergic to at least one substance for which an extract is available (pollen, dust mites, mold, dander)
- No active asthma that is uncontrolled — must be stabilized before starting AIT
- Ability to commit to 3–5 year treatment course
- No contraindications (severe cardiovascular disease, pregnancy in first trimester for new patients)