Orally deliverable dual-release pharmaceutical suspensions, having a first portion comprising an immediate release form of the active in the solution form or granules or suspended form in the vehicle/medium preferably in the solution form and a second portion comprising a sustained-release form of active in the form of microgranules/microparticles suspended in the immediate release fraction of the solulabilised active agent which comprise a core and at least one coat suitable for liquid dosage forms for the administration of the active ingredients, wherein the core comprises at least one active agent(s) or its pharmaceutically acceptable salts, derivatives, isomers, polymorphs, solvates, hydrates, analogues, enantiomers, tautomeric forms or mixtures thereof； optionally at least one water insoluble, and optionally one or more pharmaceutically acceptable excipient(s)； and at least one coat comprising at least one pH independent water-insoluble polymer(s) along with one or more pharmaceutically acceptable excipient(s). This coated microparticles and solution of the active agent in the vehicle ensures a dual release profile i.e. immediate release profile as well as predetermined sustained release profile of the active agent and also ensures maintenance of said release profile over time. The present invention can be administered either in the form of ready to use suspension or in the form of powder ready for reconstitution. Further, this invention provides process of preparation of such suspensions and method of using them.本発明は、第１部分と第２部分とを含む、経口送達可能な二段階放出型医薬懸濁剤を提供する。第１部分は、液剤の形、顆粒剤、または担体／媒体中に懸濁した形であって、好ましくは液剤の形である、薬剤の即放性形態を含む。第２部分は、液剤化された薬剤の即放性部分中に懸濁され、コアと、活性薬剤の投与のための液剤形に適した少なくとも１種のコーティングとを含む微顆粒剤／微粒子剤の形の薬剤の除放性形態を含む。該コアは、少なくとも１種の活性薬剤または薬学的に許容される塩、誘導体，異性体，多形体，溶媒和物，水和物，類似体，鏡像異性体，互変異性型またはそれらの混合物と；随意に少なくとも１種の不水溶性ポリマー（類）と；随意に１種またはそれ以上の薬学的に許容される賦形剤（類）と；少なくとも１種のｐＨ非依存性不水溶性ポリマー（類）とを、１種またはそれ以上の薬学的に許容される賦形剤（類）とともに含む。【選択図】図１
