There is no so-called “special effect medicine”, there are many allergic cough medicines, often divided into anti-allergy drugs, expectorant drugs, cough medicines, bronchodilators and other types of drugs. 1. Anti-allergic drugs: also known as antihistamines, can inhibit the allergic reaction, usually taken orally can be absorbed very quickly, within a short period of time allergy symptoms can be relieved, such as loratadine, cetirizine, etc., pay attention to the side effects of drowsiness after the use of medication to avoid driving and working at heights. 2. Expectorant drugs: patients with cough and phlegm need to use expectorant drugs, such as Ambroxol, acetylcysteine, compound fresh bamboo leaching liquid and other drugs. 3. Cough suppressants: Cough can cause chest pain and other discomforts, need to use cough suppressants, such as dextromethorphan, methoxanamine and so on. 4. Bronchodilator: For allergic cough combined with impaired lung function, consider cough variant asthma, need to apply bronchodilators, such as inhaled glucocorticoids / β2 agonists, such as budesonide formoterol, leukotriene receptor antagonists such as montelukast. It is recommended to visit the respiratory department in time, allergen testing can be done, and then avoid contact with allergens. Medications need to be taken regularly under the guidance of a doctor, do not overdose, and avoid blindly using medication on their own.