OSMOTIC DRUG DELIVERY SYSTEMS: A REVIEW

Usually oral drug delivery systems do deliver the drug with no particular release pattern and reach the targeted system with less control effective concentration subsequently unpredictable plasma concentration. To overcome this problem a lot of research and development had done, which has evolved into NDDS i.e. Novel Drug Delivery System. It’s a vast system dealing with different release pattern like matrix, diffusion, osmotic floating, liposome, nanoparticles, microsphere and the list goes on..These days old as well as new disease treatment utilize currently developed systems for its prevention and cure which includes NDDS which is beneficiary for patients. In NDDS, among all, osmotic drug delivery system is currently popular in market because of its some merits over other delivery systems. In this review article a compilation of old to latest technologies of osmotic has been included. Osmotic system is based on osmosis and osmotic pressure which is driving force for the solvent to travel through semi permeable membrane until equilibrium occur between the two compartments i.e. internal and external. It mainly consist of three things-a semi permeable membrane, a core and a delivery orifice.