OBJECTIVE To prepare the enteric microspheres of indapamide and investigate the influencing factors.METHODS Enteric microsphere of indapamide was prepared by emulsion solvent diffusion method using hydroxypropyl methylcellulose phthalate(HPMCP) as an enteric polymer.The formulation of the microspheres,recovery,drug loading,encapsulation efficiency and the releasing characteristic of microspheres in vitro were investigated.RESULTS The microspheres were spherical and smooth in appearance,bridging agent and em...