Abstract
Core–shell architecture of surfactant micelles can act to shield active drug molecules from the adverse environmental conditions and enhance their bioavailability. In the present study the molecular interactions of a fixed dose combination (FDC) containing ofloxacin (OFX) and ornidazole (ORN), with cetyltrimethylammonium bromide (CTAB, a quaternary ammonium surfactant) were investigated under normal physiological pH (pH 7.4 ± 0.1). The impact of the cationic micelle on the spectral and physiochemical properties of the FDC components OFX and ORN was systematically examined by electronic spectroscopy. Micellar liquid chromatography and differential spectral methods were used to optimize analysis of the magnitude of binding constants and related Gibbs energies. The results suggest the potential solubilization of drugs in the external part of the micelles, which may prove to be more helpful for their controlled release. These outcomes have been verified by the binding capacities of drug–CTAB combinational system that may be helpful to customize the uptake of drug molecules in cells.
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