Specific immunotherapy (SIT) involves the administration of allergen extracts to achieve
clinical tolerance of those allergens that cause symptoms in patients with allergic conditions.
Immunotherapy is effective in patients with mild forms of allergic disease and also in those
who do not respond well to standard drug therapy. Most SIT is given by means of injection,
but there is increasing interest in performing SIT through the sublingual route. SIT remains
the treatment of choice for patients with systemic allergic reactions to wasp and bee stings …