In spite of making tremendous achievements in drug delivery through various routes such as the parenteral, transdermal, Trans mucosal; the oral route remains the most favourite route because of its ease of administration, patient compliance and economic well-being. out of the various oral drug delivering technologies hydration or hydrolysis based process is one most sort after as drug taken comes directly in contact with GI fluids causing disintegration and dissolution of the drug system. In hydration based process disintegration and dissolution are controlled by the use various types of polymers and osmotic agents. Thus delivering the dose at zero order. Various processes include drug embedded or disperse in reservoir, matrixes and hybrids and physically controlled process such osmotic and hydrodynamic pressure creation. This term paper report aims at reviewing the numerous techniques that has been designed till date for optimizing hydration based drug delivery.