PEGs can be used for multiple purposes
1. Contact lens liquid. The viscosity of polyethylene glycol solution is sensitive to the shear rate and it is not easy for bacteria to grow on polyethylene glycol.
2. Synthetic lubricants. The condensation polymer of ethylene oxide and water. It is a cream matrix for preparing water-soluble drugs. It can also be used as a solvent for acetylsalicylic acid and caffeine, which is difficult to dissolve in water.
3. Drug sustained-release and immobilized enzyme carrier. The polyethylene glycol solution is applied to the outer layer of the pill to control the diffusion of drugs in the pill so as to improve the efficacy.