This invention relates to novel colonic purgative compositions in a soliddosage form, comprising at least one purgative and at least one soluble, orsoluble, nonfermentable binder, such as polyethylene glycol. Further, thisinvention relates to methods of using the colonic purgative compositions. Thepresent compositions and methods are designed to improve patient tolerance andcompliance, while at the same time improving the quality of bowel cleansing.The formulations and methods of this invention are particularly useful tocleanse the bowel prior to diagnostic and surgical procedures and can also beemployed in lower dosages as a laxative to promote elimination and/or torelieve constipation.