Drug: Laxatives Mechanism: some laxatives work as osmotics, meaning that they draw water from tissues around the intestine to help stool pass more easily. Others trigger intestinal contraction of muscles to move stool along. Note: Everyone has a different "normal" frequency of bowel movements, from three a day to three a week. Before trying laxatives, see if exercise, eating fiber-rich foods, and drinking enough fluids relieves these symptoms. Medicines: Miralax (polyethylene glycol): may take 2 to 4 days to have a bowel movement. Do not increase your dose or take it more frequently than prescribed, or for more than 2 weeks. Benefiber/Citrucel/Metamucil/FiberCon (fiber): no side effects if taken with enough water, otherwise bloating, gas, or increased constipation may occur. Dulcolax/Pedia-Lax (bisacodyl): may cause belching, diarrhea, nausea. Senokot (senna): may cause belching, diarrhea, nausea.