It relaxes vascular smooth muscle and activates guanylate cyclase by releasing nitric oxide (NO), which increases the amount of cyclic guanosine monophosphate (cGMP) in smooth muscle cells, thereby relaxing vascular smooth muscle, dilating peripheral arteries and veins, reducing myocardial oxygen consumption, increasing oxygen supply, and relieving angina pectoris.

This product has a broad-spectrum antibacterial effect, especially high antibacterial activity against aerobic Gram-negative bacilli. It has good antibacterial activity in vitro against the following bacteria: most bacteria of the Enterobacteriaceae family, including Citrobacter, cloacae, Enterobacter aerogenes, Escherichia coli, Klebsiella, Proteus, Salmonella, Shigella, Vibrio, Yersinia, etc. It often has antibacterial activity against multi-drug resistant bacteria. It has high antibacterial activity against penicillin-resistant Neisseria gonorrhoeae, enzyme-producing Haemophilus influenzae and Moraxella. It has antibacterial activity against most strains of Pseudomonas such as Pseudomonas aeruginosa. This product has antibacterial activity against methicillin-sensitive Staphylococcus aureus, and only moderate antibacterial activity against Streptococcus pneumoniae, hemolytic Streptococcus and Enterococcus faecalis. It also has good effects on Chlamydia trachomatis, Mycoplasma, Legionella, and antibacterial activity against Mycobacterium tuberculosis and atypical mycobacteria. Poor antibacterial activity against anaerobic bacteria. Ciprofloxacin is a bactericide that acts on the A subunit of bacterial DNA gyrase, inhibiting DNA synthesis and replication, leading to bacterial death.

Azithromycin is a 15-membered macrolide antibiotic. In vitro tests have shown that azithromycin has antibacterial effects on a variety of common clinical pathogens, including Gram-positive aerobic bacteria, Gram-negative aerobic bacteria, anaerobic bacteria, sexually transmitted disease microorganisms and other microorganisms. The mechanism of action is the same as that of erythromycin, mainly binding to the 50S subunit of the bacterial ribosome and inhibiting RNA-dependent protein synthesis.

This product is a macrolide antibiotic, which has an inhibitory effect on Gram-positive bacteria such as Staphylococcus aureus, Streptococcus, and Pneumococcus, as well as some Gram-negative bacteria such as Haemophilus influenzae, Bordetella pertussis, Neisseria gonorrhoeae, Legionella pneumophila, and some anaerobic bacteria such as Bacteroides fragilis, Streptococcus peptostreptococcus, and Propionibacterium acnes. In addition, it also has an inhibitory effect on mycoplasma. In vivo, its antibacterial activity against some bacteria such as Staphylococcus aureus, Streptococcus, and Haemophilus influenzae is stronger than that of erythromycin. The mechanism of action is to inhibit the association of the 50S subunit of the nucleoprotein and inhibit protein synthesis to produce an antibacterial effect.