1, the first generation of antihistamines

Representative drugs: chlorpheniramine, phenamine and diphenhydramine.

Histamine is a sensitizing substance released during allergic reaction. These drugs can compete with histamine for histamine 1 receptor on sensitized cells, so that histamine can not bind to it and produce allergic reaction. Mainly used for urticaria, allergic dermatitis and allergic cough. Their adverse reactions are drowsiness, listlessness, dry mouth, and occasionally granulocytopenia. ?

2, the second generation of antihistamines

Representative drugs: astemizole (Cismin), Terfenadine (Mindy), Loratadine (Keretam), Cetylizine (Cetirizine)?

3. Hormones

Representative drugs: hydrocortisone, dexamethasone, prednisone, etc.

Hormone drugs have many functions such as anti-inflammatory, anti-allergic and anti-shock, and are widely used in clinic. These drugs can be used to treat allergic diseases in children, such as asthma and allergic purpura, but long-term use of these drugs has many side effects such as obesity and osteoporosis, so it is not suitable for long-term application. ?

4、? Leukotriene receptor antagonist

Representative drugs: Montelukast Sodium (Shunerning), Zalukast, Prentice.