The present invention relates to an improved powdered extrudate based on polyvinyl alcohol (PVA), which can be used for pharmaceutical products, and that, due to its improved properties, can be better filled into capsules and the capsules show stable immediate drug release kinetic without problem of particle aggregation. Furthermore, this invention refers to pharmaceutical capsule composition comprising extruded polyvinyl alcohol as carrier matrix and can improve the solubility of API within immediate release kinetic. Moreover, the capsule show also benefit than tablet regarding to the material cost, because just PVA and API, no additional excipients are needed for capsule.