This product is an anticholinergic drug that can block the excitation of the iris sphincter and ciliary muscle caused by acetylcholine. Its 0.5% solution can cause mydriasis; 1% solution can cause ciliary muscle paralysis and mydriasis.

Antiviral drug. It has the effect of inhibiting the growth of many viruses such as respiratory syncytial virus, influenza virus, hepatitis A virus, adenovirus, etc. in vitro, and its mechanism is not fully understood. This product does not change the adsorption, invasion and uncoating of viruses, nor does it induce the production of interferon. After entering the virus-infected cells, the drug is rapidly phosphorylated, and its product acts as a competitive inhibitor of viral synthase, inhibiting inosine monophosphate dehydrogenase, influenza virus RNA polymerase and mRNA guanosine transferase, thereby causing a decrease in intracellular guanosine triphosphate, impairing viral RNA and protein synthesis, and inhibiting viral replication and transmission. It may also have an immune effect and neutralizing antibody effect on respiratory syncytial virus.

The relative molecular weight is similar to that of human albumin, and it has the functions of increasing plasma colloidal osmotic pressure, increasing plasma volume and maintaining blood pressure. It can disaggregate aggregated platelets and prevent thrombosis.

It can be dissolved in cold water to form a solution with a certain viscosity. Its properties are similar to the viscoelastic substances (mainly mucin) in tears and can be used as artificial tears. This product simulates natural tears.

It is effective against herpes simplex virus (HSV) type I and II, and also against varicella-zoster virus. It is phosphorylated to acyclovir monophosphate by thymidine kinase (TK) encoded by the virus, and further forms acyclovir triphosphate, inhibiting viral DNA polymerase and incorporating into viral DNA to terminate its synthesis.

Gatifloxacin is a racemic 8-methoxyfluoroquinolone compound with broad-spectrum in vitro activity against Gram-negative and Gram-positive microorganisms. Its antibacterial effect is achieved by inhibiting bacterial DNA gyrase and topoisomerase I and IV, thereby inhibiting bacterial DNA replication, transcription and repair processes. It has antibacterial activity against most strains of the following microorganisms: (1) Gram-positive bacteria: Staphylococcus aureus (limited to strains sensitive to methicillin), Streptococcus pneumoniae (strains sensitive to penicillin). (2) Gram-negative bacteria: Escherichia coli, Haemophilus influenzae and parainfluenzae, Klebsiella pneumoniae, Moraxella catarrhalis, Neisseria gonorrhoeae, Proteus mirabilis. (3) Other microorganisms: Chlamydia pneumoniae, Legionella pneumophila, Mycoplasma pneumoniae.