This study is carried out to design controlled release multilayered matrix tablets of antihypertensive drug. The aim of this research work is to reduce the frequency of dosing, decreasing the required dose employed, providing uniform drug delivery, reduction of side effects and enhancement of patient compliance of antihypertensive drug. The purpose of study to formulate and evaluate multi-layer matrix tablets using hydrophilic polymer, namely xanthan gum and chitosan by the wet granulation. Captopril was choosen as a model drug because of its higher water solubility. From the results...