Abstract
The aim of this research was the development and optimization of nanoniosomes for delivery of glibenclamide (Gbn) as hypoglycaemic agent to the lung in an inhaler dosage form. Fifteen formulae of niosomal dispersions were prepared according to Box–Behnken design. The effect of drug amount, Cholesterol molar ratio, and Hydrophilic lipophilic balance (HLB) values of the surfactant on the mean vesicle size, Zeta potential (ZP), polydispersity index (PDI), entrapment efficiency, and in-vitro released of Gbn were investigated. A quality control check was performed on an inhaler filled with the optimum nanoniosomal formula. The in-vivo hypoglycaemic effect of nanoniosomal inhalation was also evaluated. The vesicle size observed of the optimized formula was 172 ± 4.6 nm, PDI was 0.304 ± 0.06 and ZP was −49.9 ± 1.5 mv with 69 ± 9.3% in-vitro drug release after 2 h. The Cholesterol molar ratio and the HLB value showed a statistically significant effect on dependent variables. In-vivo results proved that nanoniosomes were efficiently delivered from the inhalation canister showing a mass median aerodynamic diameter of 1.4 micron. The inhaled nanoniosomal dispersion loaded with Gbn showed a decrease in blood glucose level of hyperglycaemic rats by 51.42 ± 5.2%± after 180 min which was nearly two folds compared to oral Gbn. Gibenclamide nanoniosomes inhaler could be suggested as a novel effective dosage form for the treatment of Diabetes mellitus.
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