The present study was undertaken to evaluate the extract obtained from the stem bark of Sterculia urens as a suspending agent. A suspension of calciumcarbonate was prepared using 2%w/v of Sterculia urens extract as suspending agent and it is evaluated for its stability using the parameters like, sedimentation volume, viscosity, redispersibility and pH. The suspending effect of Sterculia urens extract was compared with calcium carbonate suspensions prepared using 2% w/v of suspending agents such as acacia and tragacanth. The results obtained indicated that the Sterculia urens extract could be used as a suspending agent. It has low rate of sedimentation, high viscosity, slightly basic pH and is easily redispersible. These effects were comparable with that of the standard suspending agents like acacia and tragacanth. The extract isolated fromthe stembark of Sterculia urens can be used as a pharmaceutical adjuvant.