Allergy drops are off-label use form of allergen specific immunotherapy for many years. It is an effective allergy treatment for certain type of environmental allergy. However there are not much studies to show a standardized approach to this technique. Therefore the desensitization efficacy of several allergens are unknown as well as the consensus on treatment duration. Recently, the FDA has approved 2 types of allergy tablets for patients with Ragweed and Timothy grass allergy. Both allergy drops & allergy tablets carry a lower risk of getting anaphylaxis than allergy shots but they are only available for limited allergens.