Objective: The study was conducted with an objective to achieve a potential sustained release oral drug delivery system of an antihypertensive drug, perindopril which is a angiotensin converting enzyme inhibitor having half-life of 2 hrs. Perindopril is water-soluble drug, so we can control or delay the release rate of drug using release retarding polymers. This may also decrease the toxic side effects by preventing the high initial concentration in the blood.Methods: Microcapsules were prepared by solvent evaporation technique using Eudragit L100 and ethyl cellulose as a retarding agent to control the release rate and magnesium stearate as an inert dispersing carrier to decrease the interfacial tension between lipophilic and hydrophilic phase.Results: Prepared microcapsules were evaluated for the particle size, percentage yield, drug entrapment efficiency, flow property, and in vitro drug release for 12 hrs. Results indicated that the percentage yield, mean particle size, drug entrapment efficiency, and the micrometric properties of the microcapsules were influenced by various drug:polymer ratio. The release rate of microcapsules could be controlled as desired by adjusting the combination ratio of dispersing agents to retarding agents. Conclusion:Perindopril microcapsules can be successfully designed to develop sustained drug delivery that reduces the dosing frequency and their by one can increase the patient compliance.