This product is a fluoroquinolone antibacterial drug with a broad-spectrum antibacterial effect, especially high antibacterial activity against aerobic Gram-negative bacteria. It has good antibacterial activity against the following bacteria in vitro: most bacteria of the Enterobacteriaceae family, including Citrobacter, Enterobacter cloacae, Enterobacter aerogenes and other Enterobacter species, Escherichia coli, Klebsiella, Proteus, Salmonella, Shigella, Vibrio, Yersinia, etc. Norfloxacin also has antibacterial activity against multi-drug resistant bacteria in vitro. It also has good antibacterial effects on penicillin-resistant Neisseria gonorrhoeae, Haemophilus influenzae and Moraxella catarrhalis. Norfloxacin is a bactericide that acts on the A subunit of bacterial DNA helicase, inhibiting DNA synthesis and replication, leading to bacterial death.

Timolol maleate is a non-selective β-adrenergic receptor blocker with no obvious endogenous sympathomimetic activity and local anesthetic effect, and no direct inhibitory effect on the myocardium. This product is timolol maleate eye drops, which can reduce intraocular pressure in patients with high intraocular pressure and normal people. The exact mechanism of reducing intraocular pressure is still unclear. Tonometry and aqueous humor fluorescence studies suggest that the intraocular pressure-lowering effect of this product is related to reducing aqueous humor production.

(I)-1-(tert-Butylamino)-3-[(4-morpholinyl-1,2,5-thiadiazol-3-yl)oxy]-2-propanol maleate

This product can selectively inhibit the microRNA virus polymerase of infected cells, and inhibit the synthesis of viral RNA by inhibiting the RNA polymerase of the virus code in the infected cells, thereby inhibiting the virus. 50mu;g/ml can effectively inhibit various strains of human enterovirus, Coxsackie virus and polio virus; 10mu;g/ml can inhibit acute epidemic hemorrhagic tuberculosis and keratitis.

It has high antibacterial activity against common aerobic Gram-positive bacteria, such as Staphylococcus aureus (including those resistant to penicillin G), Staphylococcus epidermidis, β-hemolytic Streptococcus, viridans Streptococcus and Streptococcus pneumoniae. It has good antibacterial effect against anaerobic bacteria, including Clostridium tetani, Corynebacterium 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.