This product has a broad-spectrum antibacterial effect, especially high antibacterial activity against aerobic Gram-negative rods. It has good antibacterial activity in vitro against most bacteria of the Enterobacteriaceae family (including Citrobacter, Enterobacter cloacae, Enterobacter aerogenes, Escherichia coli, Klebsiella, Proteus, Salmonella, Shigella, Vibrio, Yersinia, etc.); 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; it has antibacterial activity against methicillin-sensitive Staphylococcus aureus, and only moderate antibacterial activity against Streptococcus pneumoniae, hemolytic Streptococcus and Enterococcus faecalis; it has good antimicrobial effect against Chlamydia trachomatis, Mycoplasma, Legionella, and it also has antibacterial activity against Mycobacterium tuberculosis and atypical mycobacteria; it has poor antibacterial activity against anaerobic bacteria. Ofloxacin is a bactericide that acts on the A subunit of bacterial DNA helicase, inhibiting DNA synthesis and replication, leading to bacterial death. Currently, clinical drug resistance is on the rise, and there is cross-resistance with other quinolones.

Tetracycline antibiotics. This product is a broad-spectrum antibacterial agent with bactericidal effects at high concentrations. Rickettsia, Mycoplasma, Chlamydia, atypical mycobacteria, and spirochetes are also sensitive to this product. This product is more effective against Gram-positive bacteria than Gram-negative bacteria, but Enterococcus is resistant to it. Others such as Actinomycetes, Bacillus anthracis, Listeria monocytogenes, Clostridium, Nocardia, Vibrio, Brucella, Campylobacter, and Yersinia are sensitive to this product. This product has certain antibacterial activity against Neisseria gonorrhoeae, but penicillin-resistant Neisseria gonorrhoeae is also resistant to doxycycline. Due to the widespread use of tetracyclines over the years, common clinical pathogens have become seriously resistant to this product, including Gram-positive bacteria such as Staphylococcus and most Gram-negative bacilli. This product is different from tetracycline

Ganciclovir is a guanine antiviral drug. It is a homologue of acyclovir, but has a stronger effect, especially on cytomegalovirus in AIDS patients. After entering the cell, this product is rapidly phosphorylated to form a monophosphate compound, and then converted into a triphosphate compound by the action of cellular kinase. In cells infected with cytomegalovirus, its phosphorylation process is faster than that in normal cells. The triphosphate of this drug can competitively inhibit DNA polymerase and be incorporated into the DNA of viruses and host cells, thereby inhibiting DNA synthesis. This drug has a stronger inhibitory effect on viral DNA polymerase than on host cell DNA polymerase.

Metoprolol is a selective beta-1 blocker, which means that lower doses are required to affect beta-1 receptors in the heart than to affect beta-2 receptors in peripheral vascular and bronchial sites. However, as the dose of metoprolol increases, its selectivity for beta-1 receptors decreases.

This product is a complex salt of aspirin and lysine, which can inhibit cyclooxygenase, reduce the synthesis of prostaglandins, and has antipyretic, analgesic and anti-inflammatory effects.