Oral Immunotherapy (OIT) in Practice
For many food allergy sufferers, oral immunotherapy (OIT) holds promise as a treatment option that can potentially improve their quality of life beyond the current standard of care based on allergen avoidance, epinephrine to halt severe reaction symptoms, and emergency medical care if epinephrine is used.
Treating food allergy with OIT involves eating the food allergen, starting with a very small amount and progressively increasing the dose, in an effort to retrain the immune system and raise the threshold amount of food protein that results in an allergic reaction. Successful immunotherapy can result in desensitization, in which the patient can eat a significant amount of food allergen without a reaction. Using OIT to develop desensitization to food allergens may significantly reduce food allergy reactions and the need for emergency medications and treatment. Desensitization can be lost if the allergen is not eaten on an ongoing basis.
In some cases, OIT results in sustained unresponsiveness, in which a patient can discontinue doses of the allergen for a period of weeks and still remain able to eat the allergen without reacting. However, available data indicate that for most patients, OIT does not “cure” their food allergy. Adverse effects associated with OIT treatment can be severe, including anaphylaxis and eosinophilic esophagitis.
A small but growing number of food allergy patients have pursued OIT treatment through office-based providers as well as select providers based in academic clinics. The number of providers offering OIT is growing and may increase significantly now that the U.S. Food and Drug Administration (FDA) has approved the peanut OIT product Palforzia® (formerly known as AR101). Palforzia is projected to be available in early 2020. The arrival on the market of an FDA-approved OIT product will likely expand the number of physicians willing to try administering OIT to patients.
The First OIT Summit is a Step Towards Consensus
FARE is taking the lead in educating both physicians and patients about the safety and effectiveness of OIT as a treatment option for some food allergy patients. On Nov. 6, 2019, health care providers, patient representatives, scientists and food allergy advocates came together in Houston to share their knowledge, experiences and understanding at an OIT Summit.
FARE recognizes and appreciates that members of the food allergy community hold diverse and sometimes conflicting viewpoints on OIT. To account for these views and to ensure all stakeholders are comfortable with the path forward, FARE seeks to create a robust and transparent process for advancing OIT research and establishing safe and effective OIT options for treating food allergy patients. The search for consensus on OIT can build on broadly shared points of agreement:
- The decision to pursue OIT should be a shared decision between the patient, trained allergist and relevant caregivers.
- Evaluations of OIT benefits and risks should incorporate the perspectives of food allergy patients and families.
- Tools and educational materials in plain language are needed to help patients and their families make informed decisions on whether OIT is right for them.
- OIT should be delivered by a trained allergist experienced in diagnosing and treating food allergy.