Objective To prepare ibuprofen-polyalkylcyanoacrylate-nanoparticles(IBU-PACA-NP).Methods IBU-PACA-NP were prepared by ether-interfacial polymerization method.Based on the single-factor experiment,the formulation was optimized by orthogonal design L9(34)with entrapment efficiency and drug loading as references.Results The mean diameter,entrapment efficiency and drug loading of optimized formulation were 166nm,96.60% and 17.83% respectively.Conclusions IBU-PACA-NP using ether-interfacial polymerization method...