This product is an acetanilide antipyretic analgesic. It inhibits cyclooxygenase and selectively inhibits the synthesis of prostaglandins in the hypothalamic temperature regulation center, leading to peripheral vasodilation and sweating to achieve an antipyretic effect. Its antipyretic effect is similar to that of aspirin. It inhibits the synthesis and release of prostaglandins, etc., increases the pain threshold and has an analgesic effect. It is a peripheral analgesic, weaker than aspirin, and is only effective for mild and moderate pain. This product has no obvious anti-inflammatory effect.

It acts on dihydrofolate synthase, interfering with the first step of folic acid synthesis; combined with trimethoprim, it can double-block the folic acid metabolism of bacteria, and the synergistic antibacterial effect is enhanced compared with single drug, reducing the number of drug-resistant strains.

It acts on the second step of folic acid anabolism and selectively inhibits the action of dihydrofolate reductase. When used in combination with sulfamethoxazole, it can double-block the folic acid metabolism of bacteria. The synergistic antibacterial effect is enhanced compared with that of a single drug, and the number of drug-resistant strains is reduced.

This product is an analogue of diphenhydramine, which mainly suppresses cough center and relieves cough. It also has a weak antihistamine effect and has no dependence or tolerance. It takes effect 20-30 minutes after taking it and the effect lasts for 3-4 hours.

Broad-spectrum antiviral drug. It has the effect of inhibiting the growth of multiple viruses such as respiratory syncytial virus, influenza virus, hepatitis A virus, adenovirus, etc. in vitro, and its mechanism is not fully understood. 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.