A Review of Novel Drug Delivery Controlled Porosity Osmotic Pump Tablets Therapeutic Approach and Future Trend

Abstract

The review work is comprised the enhancement of bioavailability and increase therapeutic efficacy. The porous osmotic pump tablets were designed using D‐Optimal design and numerical optimization technique was applied to find out the best formulation. Another hand an osmotic pump (OP) were designed and evaluated with the aim to deliver drug in a controlled manner. Osmotic agent and pore former was considered as independent variables. Drug release rate at 2 h, 4 h, 8 h, 12 h, T50% and release exponent (n) were taken as responses. The increase in concentration of pore former and osmotic agent after a limit, changes the release was measured. The optimized formulation follows mechanism measured. The FT‐IR and DSC studies revealed that no physicochemical interaction between excipients and drug. The influence of pH and agitation intensity on the release of drug was studied and the release mechanism was through osmosis. Stability studies revealed that optimized formulation was stable. The result of D‐ Optimal design and ANOVA studies reveals that osmotic agent and pore former have significant effect on the drug release up to 12 h. The observed independent variables were found to be very close to predicted values of most satisfactory formulation which demonstrates the feasibility.
 Keywords: osmotic pump, pore former, bioavailability