Abstract
Purpose: To develop a high-throughput formulation screening (HTFS) system for self-microemulsifying drug delivery system (SMEDDS) formulations. Methods: Formulations were prepared by dispensing surfactants and a model compound (Nilvadipine) dissolved in ethanol and oil with a robotic liquid dispenser. Screenings of emulsion particle size and phase stability were conducted for selecting SMEDDS formulations by a turbidity assay. Results: Formulations were prepared at 40 minute/96-formulation. Both the screenings were conducted at 1 minute/96-formulation. SMEDDS formulations and the most suitable hydrophilic surfactant (HS)/lipophilic surfactant (LS) combination, which formed the largest SMEDDS area on its corresponding phase diagram, were selected by SMEDDS–HTFS system with minimal manpower (one person) and compound consumption (0.2 mg/formulation). Conclusions: SMEDDS–HTFS system enabled rapid and efficient selections of SMEDDS formulations and the most suitable HS/LS combination for SMEDDS.
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