Formulation and Characterization of Nefopam Hydrochloride-Loaded Niosomes for Enhanced Analgesic Drug Delivery
Abstract
Background: Nefopam Hydrochloride (NF-HCl) is a centrally acting non-opioid analgesic with limited oral bioavailability due to first-pass metabolism. To overcome this limitation and provide sustained drug release, niosomal drug delivery systems were explored.
Objective: To formulate and characterize NF-HCl-loaded niosomes using Span surfactants and cholesterol via Hand Shaking Method (HSM) and Ether Injection Method (EIM), and evaluate their physicochemical and drug release properties.
Methods: Twelve niosomal formulations were prepared using three non-ionic surfactants (Span 20, 40, and 60) in 1:1 and 2:1 molar ratios with cholesterol. The formulations were evaluated for entrapment efficiency (EE%), vesicle size, morphology, zeta potential, in vitro drug release, and drug release kinetics.
Results: Among the formulations, PNF-9 (Span 60:CH, 1:1, EIM) showed the highest EE (58.94%), sustained drug release (58.82% over 8 hours), and a zeta potential of −64.6 mV. Drug release kinetics followed the Korsmeyer-Peppas model with an R² value of 0.9965, indicating non-Fickian diffusion. Stability studies confirmed greater retention at 4–8°C.
Conclusion: The optimized NF-HCl niosomal formulation (PNF-9) prepared via EIM using Span 60 exhibited promising characteristics for sustained and targeted analgesic delivery, potentially enhancing therapeutic efficacy and patient compliance.
Keywords: Niosomes, Nefopam Hydrochloride, Span 60, Entrapment Efficiency, Drug Release Kinetics, Ether Injection Method
Keywords:
Niosomes, Nefopam Hydrochloride, Span 60, Entrapment Efficiency, Drug Release Kinetics, Ether Injection MethodDOI
https://doi.org/10.22270/jddt.v15i7.7279References
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