Hydroxypropyl methylcellulose is a partial methyl and partial polyhydroxypropyl ether of cellulose, which 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 it can be used as artificial tears. It adheres to the surface of the eyeball through the adsorption of the polymer, simulates the effect of conjunctival mucin, improves the state of reduced eye mucin and increases the retention time of the eyeball under the state of reduced tears. This adsorption effect is independent of the viscosity of the solution, ensuring that low-viscosity solutions can also have a lasting wetting effect. In addition, the wetting of the cornea is increased by reducing the contact angle of the clean corneal surface, and the stability of the precorneal tear film is enhanced.

Hydroxypropyl methylcellulose is a partial methyl and partial polyhydroxypropyl ether of cellulose. It can be dissolved in cold water to form a solution with a certain viscosity. Its properties are close to the viscoelastic substances (mainly mucin) in tears, so it can be used as artificial tears. Its mechanism of action is: it attaches to the surface of the eyeball through the adsorption of the polymer, simulating the effect of conjunctival mucin, thereby improving the state of reduced eye mucin and increasing the retention time of the eyeball under the state of reduced tears. This adsorption effect is independent of the viscosity of the solution, ensuring that solutions with very low viscosity can also have a lasting wetting effect. In addition, by significantly reducing the contact angle of the clean corneal surface to increase the wetting of the cornea, it can also increase the stability of the precorneal tear film.

This product is a semi-synthetic aminoglycoside antibiotic. It has strong antibacterial activity against aerobic Gram-negative bacteria, and its antibacterial spectrum is similar to that of gentamicin. It has good antibacterial effects on Escherichia coli, Pseudomonas aeruginosa, indole-negative and -positive Proteus, Klebsiella, Acinetobacter, Citrobacter, and some strains of Serratia and Enterobacter. It also has good antibacterial effects on Mycobacterium tuberculosis, atypical mycobacteria and Staphylococcus aureus (enzyme-producing and non-enzyme-producing strains). Other Gram-positive bacteria (including fecal streptococci), anaerobic bacteria, Rickettsia, fungi and viruses are not sensitive to this product. This product is stable to aminoglycoside acetyltransferase AAC (3), so it can produce this enzyme. Strains resistant to kanamycin, gentamicin, tobramycin and sisomicin are sensitive to this product. This product can often achieve synergistic effects when used in combination with beta-lactams. The mechanism of action of this product is to bind to the 30S subunit of the bacterial ribosome and inhibit the synthesis of bacterial proteins. Animal test data indicate that this product has lower ototoxicity than gentamicin and tobramycin, and lower nephrotoxicity than gentamicin.