As a histamine H1 receptor antagonist, this product can counteract the capillary dilation caused by allergic reactions, reduce the permeability of capillaries, and relieve wheezing caused by bronchial smooth muscle contraction. This product has a long-lasting antihistamine effect and also has a significant central inhibitory effect, which can increase the effects of anesthetics, analgesics, hypnotics and local anesthetics. This product is mainly metabolized in the liver.

This product is a phenothiazine antipsychotic, and its mechanism of action is mainly related to its blocking of dopamine receptors (DA2) in the mesolimbic system and mesocortical pathways. It has a blocking effect on dopamine (DA1) receptors, 5-hydroxytryptamine receptors, M-type acetylcholine receptors, and α-adrenaline receptors, and has a wide range of effects. In addition, this product can inhibit the dopamine receptors in the medulla oblongata emetic chemoreceptor area at low doses, and directly inhibit the vomiting center at high doses, producing a strong antiemetic effect. It inhibits the body temperature regulation center and lowers the body temperature. The body temperature can change with changes in the external environment. It blocks the action of peripheral α-adrenaline receptors, dilates blood vessels, causes a drop in blood pressure, and also has a certain effect on the endocrine system.

It can inhibit the synthesis of prostaglandins and has antipyretic and analgesic effects

It is an antihistamine that can relieve symptoms such as runny nose, nasal congestion, and sneezing.

Antipyretic and sedative effects

Broad-spectrum antiviral drug. It has the effect of inhibiting the growth of many viruses such as respiratory syncytial virus, influenza virus, hepatitis A virus, adenovirus, etc. in vitro, and its mechanism is not fully understood. This product does not change the adsorption, invasion and uncoating of viruses, nor does it induce the production of interferon. After entering the virus-infected cells, the drug is rapidly phosphorylated, and its product acts as a competitive inhibitor of viral synthase, inhibiting inosine monophosphate dehydrogenase, influenza virus RNA polymerase and mRNA guanosine transferase, thereby causing a decrease in intracellular guanosine triphosphate, impairing viral RNA and protein synthesis, and inhibiting viral replication and transmission. It may also have an immune effect and neutralizing antibody effect on respiratory syncytial virus.