There is no fastest way to eliminate systemic allergies. For patients with systemic allergies, they can be treated with antihistamines, glucocorticoids, etc., and the triggers need to be removed. 1. Antihistamines: for systemic allergies, you can also cooperate with the doctor to choose antihistamines, commonly used drugs include chlorpheniramine maleate, cetirizine, loratadine and so on. 2. Glucocorticosteroids: for patients with more obvious systemic allergic inflammation, you can cooperate with the doctor to choose prednisone, dexamethasone or hydrocortisone and other medications to reduce the patient’s clinical symptoms. 3. Remove the triggers: For people with allergies, they should try to avoid contacting allergens, especially known allergens, to avoid repeated attacks of allergy symptoms, which affects their health. If the above symptoms occur, it is recommended to go to the hospital in a timely manner, early formal treatment. The above drugs need to be used under the guidance of a doctor, do not blindly use drugs.