Self-Nanoemulsifying Drug Delivery Systems (SNEDDS): An innovative Approach

Abstract

Self-Nanoemulsifying Drug Delivery Systems (SNEDDS) represent an innovative and efficient approach to enhance the solubility, dissolution rate, and oral bioavailability of poorly water-soluble drugs. This review focuses on the formulation and evaluation of SNEDDS containing Satranidazole and Ofloxacin—two potent antimicrobial agents used in the treatment of mixed bacterial and protozoal infections, particularly in the gastrointestinal and genitourinary tracts. Both drugs exhibit solubility and permeability limitations that restrict their oral bioavailability and therapeutic efficacy. The SNEDDS approach utilizes an isotropic mixture of oils, surfactants, and co-surfactants that spontaneously form fine oil-in-water nanoemulsions upon mild agitation in gastrointestinal fluids, facilitating enhanced absorption. The review highlights key formulation aspects including selection of oil phase, surfactant, and co-surfactant based on solubility studies, emulsification efficiency, and construction of pseudo-ternary phase diagrams. Evaluation parameters such as globule size, zeta potential, emulsification time, thermodynamic stability, drug loading efficiency, and in vitro drug release are critically discussed. The SNEDDS formulation of Satranidazole and Ofloxacin offers a promising strategy for improving oral bioavailability, providing rapid onset of action, and achieving synergistic antimicrobial activity with reduced dosing frequency and gastrointestinal side effects.

Keywords: SNEDDS; Satranidazole; Ofloxacin; Nanoemulsion; Bioavailability enhancement; Solubility improvement; Antimicrobial therapy.