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It has the function of selectively relaxing ballistic smooth muscle and directly inhibiting the sphincter of Oddi in the bile duct, which can relax the bile duct sphincter and reduce the resistance to the passage of the common bile duct at the confluence with the duodenum; it can reduce the pressure inside the gallbladder and bile duct, promote the excretion of bile and pancreatic juice, improve appetite and eliminate abdominal distension; it has antispasmodic, analgesic and choleretic effects.

It has an inhibitory effect on a variety of Gram-positive and Gram-negative bacteria in vitro, and has a stronger inhibitory effect on hemolytic Streptococcus, Staphylococcus aureus, Vibrio cholerae, Neisseria meningitidis, Shigella, Salmonella typhi, Corynebacterium diphtheriae, etc. It also has a certain inhibitory effect on amoeba.

It mainly interferes with bacterial folate metabolism, selectively inhibits dihydrofolate reductase, and prevents nucleic acid synthesis.

After entering the body, this product can combine with poisons containing hydroxyl or carboxyl groups to form low-toxic or non-toxic combinations that are excreted in the urine, protecting the liver and detoxifying. In addition, glucuronic acid can increase the content of liver glycogen and reduce fat reserves.

This product belongs to the macrolide antibiotics, which is the dodecyl sulfate of erythromycin propionate. It has antibacterial activity against Staphylococcus, various groups of streptococci and Gram-positive bacilli. Neisseria, Haemophilus influenzae, Bordetella pertussis, etc. may also be sensitive to this product. This product also has antibacterial activity against various anaerobic bacteria except Bacteroides fragilis and Fusobacterium; it also has inhibitory effects on Legionella, Campylobacter fetus, some spirochetes, Mycoplasma pneumoniae, Rickettsia and Chlamydia. This product is an antibacterial agent, but it also has a bactericidal effect on some bacteria at high concentrations. This product can pass through the bacterial cell membrane and reversibly bind to the 50S subunit of the bacterial ribosome near the donor site (P site), blocking the transfer RNA (t-RNA) binding to the P site, and also blocking the displacement of the polypeptide chain from the acceptor site (A site) to the P site, thereby inhibiting bacterial protein synthesis. This product is only effective against bacteria with active division.