Overcoming the dissolution rate, gastrointestinal permeability and oral bioavailability of glimepiride and simvastatin co-delivered in the form of nanosuspension and solid self-nanoemulsifying drug delivery system: A comparative study

Published on Dec 1, 2020in Journal of Drug Delivery Science and Technology2.734
· DOI :10.1016/J.JDDST.2020.102083
Narendra Kumar Pandey9
Estimated H-index: 9
(LPU: Lovely Professional University),
Sachin Kumar Singh19
Estimated H-index: 19
(LPU: Lovely Professional University)
+ 15 AuthorsKamal Dua28
Estimated H-index: 28
(UTS: University of Technology, Sydney)
Abstract Simvastatin (SIM) and glimepiride (GLM) were co-formulated into nanosuspensions and self-nanoemulsifying drug delivery systems (SNEDDS) to improve their dissolution rate and oral bioavailability. Nanosuspension was prepared by liquid anti-solvent precipitation method, involving supersaturation of a solution by mixing the drug solution in an antisolvent. Liquid SNEDDS were prepared by loading drugs into an isotropic mixture of Capmul MCM, Labrafil M1944CS, Tween-80 and Transcutol P. Both formulations were solidified using spray drying. Enhancement in dissolution rate by 6.4 folds and 4.45 folds was observed for GLM and SIM respectively by preparing their nano-formulations. Drugs’ permeability was also enhanced by loading them into nano-formulations. The pharmacokinetic studies were conducted on rats which revealed increase in oral bioavailability by 6.69- and 4.22-folds for GLM and 1.76- and 2.68-folds for SIM respectively for nanosuspension and solid SNEDDS than their unprocessed forms. Both dissolution rate and oral bioavailability of SIM and GLM got significantly improved through S-SNEDDS and nanosuspension. However, performance of nanosuspension was found better than SNEDDS in terms of dissolution rate and oral bioavailability.
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