Objective To compare the in vitro transdermal penetration of ketoprofen ethosomal(KPFE) gels and liposomal(KPFL) gels to screen the optimal external preparation for KPF.Methods KPFE gels and KPFL gels were prepared.Skipped mouse skin as the barrier,the in vitro transdermal penetration of the two gels was studied and compared by using Franz diffusion cells.Results Both the in vitro transdermal penetration of the two gels was fitted with Higuchi equation,Q=28.65 t1/2-16.88(R2=0.995) for KPFL gels and Q=35.22 ...