Fleet Naturals Enema Twin Pack LU016. Fleet Enema is used for: treating constipation or cleansing the bowel before certain medical procedures. It may also be used for other conditions as determined by your doctor. Fleet Enema is a saline laxative enema. It works by pulling water from the body into the bowel, which helps to soften the stool and cause a bowel movement. Do not take if you are allergic to any ingredient in Fleet Enema if you have a blockage of the bowel or other severe bowel problems, congestive heart failure, kidney failure, or too much phosphate in the blood. Contact your doctor or health care provider right away if any of these apply to you. Before using Fleet Enema: some medical conditions may interact with Fleet Enema. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you: if you are pregnant, planning to become pregnant, or are breast-feeding, if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement, if you have allergies to medicines, foods, or other substances, if you are on a sodium-restricted diet or have a history of stomach or bowel problems, if you have appendicitis, liver or kidney problems, high blood pressure, low parathyroid function, bone problems (eg, osteomalacia), muscle problems (eg, rhabdomyolysis), pancreas problems, a kidney or bladder infection, kidney stones, electrolyte problems (eg, low blood calcium), a colostomy, nausea, vomiting, stomach pain, or a sudden change in bowel movements lasting longer than 2 weeks, if you have already used a laxative for more than 1 week Some medicines may interact with Fleet Enema. However, no specific interactions with Fleet Enema are known at this time. Ask your health care provider if Fleet Enema may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.