Sodium phosphate draws water into the intestines. This action softens stool and triggers a bowel movement, offering relief from occasional constipation. It also clears the colon before medical procedures. Take it by mouth as a liquid or tablet, exactly as directed, and only for a short time.
Do not take it for more than a few days. If you have kidney disease, heart problems, or electrolyte imbalances, talk to a doctor before using sodium phosphate.