Exposing people to bigger and bigger amounts of allergen, often identified as allergen immunotherapy , is usually efficient. The allergen can be given as an injection underneath the skin or as a pill under the tongue. Treatment sometimes lasts three to 5 years, after which benefits could additionally be prolonged. https://trevorkbhex.tribunablog.com/seasonal-allergies-allergic-rhinitis-fact-sheets-yale-medication-30772751