1. excipients for ocular drug delivery systems, which play a prominent role in the controlled release of ocular drugs.
2. To give good drug release properties in oral formulations. Since HEC is the most hydrophilic and soluble polymer of cellulose, unlike other celluloses, the drug-loaded HEC matrix backbone shows synchronous drug diffusion and backbone solubility, with the potential for readily accessible zero-stage drug release.
3. for time-lag drug delivery systems. Since HEC has non-ionic properties. Independent of pH, it can make the drug release at a predetermined time and can act quickly, commonly used viscosity 25mpa.s.
4. for bioadhesive materials etc.