Objective To prepare extended-release matrix tablets of zidovudine using hydrophilic Eudragit alone or their combination with hydrophobic ethyl cellulose.Methods Five recipes were determined.Matrix tablets were prepared by wet granulation method.Results The in-vitro drug release study revealed that Eudragit preparation was able to sustain the release only for 6 hours(94%±4.5%),while combining Eudragit with ethyl cellulose could sustain the drug release for 12 hours(88%±4.1%).Conclusion The developed sustain...