This product is a dopamine 2 (D2) receptor antagonist, and also has a 5-hydroxytryptamine 4 (5-HT4) receptor agonist effect, and has a mild inhibitory effect on 5-HT3 receptors. It can act on dopamine receptors in the medullary emetic chemoreceptor zone (CTZ) to increase the threshold of CTZ, and has a strong central antiemetic effect. This product can also block hypothalamic dopamine receptors, inhibit prolactin inhibitory factor, and promote the secretion of prolactin, so it has a certain lactation effect. The inhibitory effect on other parts of the central nervous system is relatively small, with a weak sedative effect and less hypnotic effect. The effect on the gastrointestinal tract is mainly in the upper digestive tract, promoting the movement of the stomach and upper intestinal segments; increasing the tension of the gastrointestinal sphincter in the resting state, increasing the tension and contraction amplitude of the lower esophageal sphincter, and increasing the pressure at the lower end of the esophagus.

It can cause blood vessels to contract, reduce capillary permeability, enhance platelet aggregation and adhesion, promote platelets to release coagulation active substances, shorten coagulation time, and achieve hemostatic effect.

It can cause blood vessels to contract, reduce capillary permeability, enhance platelet aggregation and adhesion, promote platelets to release coagulation active substances, shorten coagulation time, and achieve hemostatic effect.

This product has a broad-spectrum antimicrobial effect in vitro, including aerobic Gram-negative and Gram-positive bacteria, anaerobes, Rickettsia, spirochetes and Chlamydia. It has bactericidal effects on the following bacteria: Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis. It only has antibacterial effects on the following bacteria: Staphylococcus aureus, Streptococcus pyogenes, Streptococcus viridans, Group B hemolytic Streptococcus, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Salmonella typhi, Salmonella paratyphi, Shigella, Bacteroides fragilis and other anaerobic bacteria. The following bacteria are usually resistant to chloramphenicol: Pseudomonas aeruginosa, Acinetobacter, Enterobacter, Serratia marcescens, indole-positive Proteus, methicillin-resistant Staphylococcus and Enterococcus. This product is an antibacterial agent. Chloramphenicol is fat-soluble and enters bacterial cells by diffusion, and reversibly binds to the 50S subunit of the bacterial ribosome, which blocks the growth of the peptide chain (possibly due to the inhibition of the action of transpeptidase), thereby inhibiting the formation of the peptide chain and preventing protein synthesis.

Antibacterial drug. It has a broad antibacterial spectrum and has inhibitory effects on a variety of Gram-positive and Gram-negative bacteria in vitro, among which it has a strong inhibitory effect on hemolytic streptococci, Staphylococcus aureus, Vibrio cholerae, Neisseria meningitidis, Shigella, Salmonella typhi, Corynebacterium diphtheriae, etc. It also has a certain effect on amoeba.