It has a strong antibacterial effect on most anaerobic bacteria, and the antibacterial spectrum includes Bacteroides fragilis and other Bacteroides, Fusobacterium, Clostridium perfringens, Eubacterium, Veillonella, Peptococcus and Peptostreptococcus. The bactericidal concentration is slightly higher than the inhibitory concentration. In addition, it also has a strong killing effect on amoeba and Trichomonas. The bactericidal mechanism is that the nitro group of metronidazole is reduced to a cytotoxin, which acts on the DNA metabolism process of bacteria and promotes cell death. The mechanism against amoeba is to inhibit its redox reaction, causing the nitrogen chain of the protozoa to break.

It has a certain antibacterial effect on most Gram-positive and Gram-negative bacteria, and inhibits the early synthesis of bacterial cell walls, thereby blocking the synthesis of bacterial cell walls and causing their death.

This product is a gastrin receptor antagonist that can specifically compete with gastrin for gastrin receptors on parietal cells, inhibiting the secretion of gastric acid and pepsin caused by gastrin; increasing the aminohexose content of gastric mucosa, promoting glycoprotein synthesis, protecting gastric mucosa and promoting healing; no rebound of gastric acid secretion occurs after treatment, and gastric acid secretion can maintain normal levels for up to half a year; it has a choleretic effect, including stimulating bile secretion, changing bile stone-forming factors and antagonizing gallbladder contraction caused by CCK.

It selectively inhibits succinate dehydrogenase in the muscles of the worm, affects the anaerobic metabolism of the muscles of the worm, and reduces energy production; it depolarizes the nerve muscles, causing continuous muscle contraction and paralysis; its cholinergic effect helps the worm to be expelled; it may have an inhibitory effect on the microtubule structure of the worm; it has immune regulation and immune excitation functions.

It has high antibacterial activity against common aerobic Gram-positive bacteria, such as Staphylococcus aureus (including those resistant to penicillin G), Staphylococcus epidermidis, beta-hemolytic Streptococcus, viridans Streptococcus and Streptococcus pneumoniae. It has good antibacterial effect on anaerobic bacteria, including Clostridium diphtheriae, and Clostridium perfringens. It has no activity against Gram-negative bacteria such as Enterococcus, meningococci, Neisseria gonorrhoeae, and Haemophilus influenzae, as well as fungi. There is no cross-resistance with penicillin, chloramphenicol, cephalosporins and tetracyclines, and there is partial cross-resistance with macrolides. It acts on the 50S subunit of the ribosome of sensitive bacteria, preventing the extension of the peptide chain, thereby inhibiting the protein synthesis of bacterial cells. It is generally an antibacterial agent, but at high concentrations, it also has a bactericidal effect on certain bacteria.