a clear diagnosis bellman was allergic to house dust mites and certain grasses. his doctor set out the options regarding desensitization therapy which is also called allergen immunotherapy. other sleep that i there are three forms of immunotherapy. first via the subcutaneous injection of allergens. this can only be done in a doctor's office. second via drops under the tongue and third tablets you let dissolve under the tongue me. one advantage of the injection method is that the dosage can be customized but you have to go to the doctors every four weeks over the course of the therapy patients can take the drops and tablets at home what hell is the thing the side effects are less severe with tablets than injections the. doc to focus your hands and recommends