DEVELOPMENT AND IN VITRO EVALUATION OF NANOLIPID CARRIERS OF CLOBETASOL PROPIONATE AND PRAMOXINE HYDROCHLORIDE FOR TOPICAL DELIVERY
Keywords:Clobetasol propionate, Pramoxine hydrochloride, NLC, Melt-emulsification ultrasonication method, Atopic dermatitis
Objective: Formulation and characterization of clobetasol propionate (CP) and pramoxine hydrochloride (PH) loaded nanostructured lipid carriers (NLC) offering improved performance in terms of drug loading and long-term stability for topical drug delivery.
Methods: Drug-loaded NLC formulation was designed by melt-emulsification ultrasonication technique, by fluctuating the concentration of stearic acid and oleic acid. Poloxamer F68 and tween 80 were used as surfactants in the formulation and soya lecithin was used as stabilizer and co-surfactant. Differential scanning calorimetry (DLS), scanning electron microscopic studies (SEM), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), x-ray diffraction (XRD), are the techniques used to characterize the preparations. Optimized drug-loaded formulations were evaluated for particle size, zeta potential, entrapment efficiency, in vitro drug release, hemocompatibility assay and cytotoxicity screening.
Results: For drug loaded formulation the particle size was found in nanometric range. In vitro drug release was carried out using dialysis membrane and drug release after 24h was found to be 90.98 %Â±1.89 for CP and 79.81 %Â±4.20 for PH.
Conclusion: The formulated NLC is a potential approach for sustained release of drug which may reduce systemic side effects, increase skin retention time and duration of action. Further in vivo studies will confirm the effect of NLC to increase skin retention time, decreases systemic absorption of the corticosteroid thereby avoiding side effects.
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