Stability studies were performed on various formulations of aceclofenac tablets prepared by wet granulation method and solid dispersions using Eudragit RS 100 as a rate controlling polymer. The in vitro drug release was found to be 89% for aceclofenac from solid dispersion formulation (B7) compared with 83% from wet granulation formulation (B1). Selected formulation (B7) was packed and stored at 40 ± 2oC with 75 ± 5% RH for a period of six months and 25 ± 2oC with 60 ± 5% RH for a period of 9 months. At every 1, 2, 3, 6 and 9 months, samples were evaluated for appearance, hardness, friability, weight variation, drug content and drug release studies. A slight variation occurred in above parameters periodically in aceclofenac content. Drug release rate was good, when stored under accelerated conditions.