Formulations and methods of manufacturing formulations for use in colonic evacuation are disclosed herein in an embodiment a solid dosage formulation includes an intra granular fraction intermingled with an extra granular fraction wherein the intra granular fraction includes granules comprising at least one osmotic evacuant agent at least one antacid and a first pharmaceutically acceptable excipient component and wherein the extra granular fraction includes one or more organic acids a non metallic lubricating element and a second pharmaceutically acceptable excipient component.
