Objective: Purpose of this research was to get the optimum formulation of Self-Nanoemulsifying Drug Delivery System (SNEDDS) of mangosteen peels and to evaluate the permeation ability of active substances in the formulation. Method: Oil phase solubility of ethanol extract, ethyl acetate extract, ethyl acetate fraction, n-hexane fraction and residue of the mangosteen peels was tested with virgin coconut oil (VCO). The formulation was designed with a simplex lattice design using Design Expert software and the permeation was tested using Franz diffusion cell. Results: Based on the results of simplex lattice design methods obtained that the optimum formulation of SNEDDS was the composition of VCO, Tween 80, PEG 400 at a ratio of 1:6,95:2,05. The results of permeation test in vitro using Franz Diffusion cell indicated that the obtained SNEDDS ethyl acetate fraction of mangosteen peels that is 96.9223% higher than without preparation SNEDDS was 18,9426 % on hour-8. The optimum physical evaluation SNEDDS optimum values obtained involved drug loading of 125mg/5 mL SNEDDS, the transmittance value of 92%, emulsification time of 65 seconds, pH of 6.35, particle size 20 nm, zeta potential -12,40 and stable for three months. Conclusion: SNEDDS can improve the diffusion rate of mangosteen peels as a model poorly water soluble drug.Various samples of mangosteen peels were screened as candidates for SNEDDS on the basis of solubility of the active compound in oils, surfactants, and co-surfactants. Simplex lattice design methods can be used to obtain optimum formulation on SNEDDS.
Key words: SNEDDS, Extract, Fraction, Mangosteen Peels, Simplex Lattice Design.