How Can I Find Allergy Relief?

An allergic reaction is an allergic reaction, which refers to tissue damage or physiological disturbance caused by the body's stimulation by antigenic substances. It is an immune pathological damage process. Anti-allergic drugs are also known as anti-allergic drugs for preventing and treating allergic diseases caused by various antigenic substances (such as bacteria, viruses, parasites, and pollen). Depending on the mechanism of action, it can be divided into the following categories:

Basic Information

Chinese name

Antiallergic drugs

Category

drug

Explanation

Refers to antihistamines

Features

Absorbs quickly after oral administration

Antiallergic pharmacological effects

It is mainly able to antagonize the effects of mediators (such as histamine, etc.) that cause allergic reactions on its receptors (such as histamine H ₁ receptor), and competitively block H ₁ receptors on bronchial, gastrointestinal, and uterine smooth muscle. It can completely counteract the smooth muscle contraction and spasm caused by histamine; it obviously counteracts the increase of capillary permeability and local congestion and edema caused by histamine; it partially counteracts the effect of histamine to expand blood vessels and reduce blood pressure; it does not protect human anaphylactic shock effect. Some of these drugs still have some central inhibitory and anticholinergic effects, which can lead to some common adverse reactions. Clinically used are chlorpheniramine, diphenhydramine, cyproheptadine, and cetirizine.

Application of anti-allergic drugs

Histamine H ₁ receptor antagonists are mainly used for skin and mucosal allergic diseases, such as itching and edema of the skin caused by urticaria, allergic rhinitis, and insect bites; it has effects on itching caused by serum disease, drug rash, and contact dermatitis Antipruritic effect; poor effect on allergic bronchial asthma; not effective on anaphylactic shock.

Antiallergic adverse reactions

The main adverse reactions of histamine H ₁ receptor antagonists are headache and drowsiness caused by central inhibitory effects, and dry mouth, blurred vision, dysuria, and constipation caused by anticholinergic effects.

Anti-allergic precautions

Newborns and premature infants are more sensitive to the anticholinergic effects of histamine H ₁ receptor antagonists and should not be used; antihistamines can inhibit the skin test response of allergenic substances, so it should be used several days before the skin test Stop using all antihistamines to avoid affecting skin test results. Anti-allergic drugs have side effects. It is not advisable to take a certain type of anti-allergic drug for a long time or in large doses. Otherwise, it will not only easily cause drug failure, but also serious adverse reactions, even toxic side effects. When taking anti-allergic drugs, be sure to consult your doctor if you need to take other western medicine.

(Note: The above content is only for introduction, the drug use must be carried out by a regular hospital under the guidance of a doctor.)