BENAZEPRIL HYDROCHLORIDE LOADED NIOSOMAL FORMULATION FOR ORAL DELIVERY: FORMULATION AND CHARACTERIZATION
DOI:
https://doi.org/10.22159/ijap.2018v10i5.27564Keywords:
Benazepril hydrochloride, Niosomes, Oral delivery, Thin film hydrationAbstract
Objective: The objective of the present study was to formulate niosomal formulations of benazepril hydrochloride in an attempt to overcome the hurdles associated with itʼs poor oral absorption.
Methods: Nine formulations were prepared with various ratios of sorbitan monostearate (span 60), sorbitan monopalmitate (span 40) and polyoxyethylene 2 stearyl ether (brij 72) as non-ionic surfactants, cholesterol as a stabilizing agent and soya lecithin as a charge imparting agent. Then, they were characterized for vesicle size, polydispersity (PDI), entrapment efficiency (EE %), release profile, zeta (ζ) potential and transmission electron microscopy (TEM).
Results: Niosomal formulations exhibited an efficient entrapment range between (80.4-97.8) percent, vesicles size analyses revealed the formation of homogenously dispersed vesicles having a size range of (3.9±1.7-8.72±4.4) micrometers. The in vitro release studies revealed that all formulations displayed sustained release in comparison with the pure drug. Formulations prepared with span 60 and span 40 possessed adequate stability according to zeta potential analysis, whereas brij 72 failed the test and possessed inadequate zeta potential range. TEM images of the optimized formulations (F7 and F8) have confirmed the formation of vesicles with spherical shapes.
Conclusion: Based on the study results, niosomal formulations seem to be attractive alternatives to conventional delivery for benazepril hydrochloride.
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