The invention relates to liquid pharmaceutical formulations for oral administration with the modified release of active principle(s), excluding amoxicillin, said formulations consisting of suspensions of coated particles of active principles (microcapsules). According to the invention, the microcapsules constituting the disperse phase of the suspension are designed to allow the modified release of the active principle(s) according to a profile that does not change during the storage of the liquid suspension. To do this the inventors propose the selection of a specific coating composition for the microcapsules which consists of at least four components that allow these microcapsules to be stored in water without modifying their properties of modified release of the active principle, this liquid phase furthermore being saturated with active principle(s).