Formulations Composition (wt. %) Oil Ibuprofen Tween 80 Water F1 4.55 0.45 45 50 F2 4.55 0.45 40 55 F3 4.55 0.45 35 60 F4 4.55 0.45 30 65 F5 4.55 0.45 25 70 F6 4.55 0.45 20 75 *Nanoemulsions were produced by addition of water into the mixture of oil/ ibuprofen/Tween 80

Table 1: Composition of palm-based esters nanoemulsion formulations prepared by spontaneous emulsification method.