SIDE EFFECTS: Loss of appetite, nausea, vomiting, or constipation may occur. Less frequently, diarrhea may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. To prevent constipation, eat a diet adequate in fiber, drink plenty of water, and exercise, unless otherwise directed by your doctor. Severe constipation can become very serious. Consult your doctor or pharmacist for help in selecting a laxative (non-sorbitol type). Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: muscle weakness/spasms, fast/irregular heartbeat, mental/mood changes (such as irritability, confusion, slowed thinking), swelling hands/ankles/feet. This medication may cause serious (rarely fatal) intestinal problems (such as bleeding, blockage). Get medical help right away if any of these very serious side effects occur: severe constipation, bloating/swelling/pain in the stomach/abdomen, black/bloody stools, vomit that looks like coffee grounds. Get medical help right away if you have any very serious side effects, including: inability to move your muscles (paralysis), seizures. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using sodium polystyrene sulfonate, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. This medication contains a large amount of salt (sodium). Do not use salt substitutes that contain potassium without asking your doctor first. If you have any of these conditions, follow your doctor's instructions for limiting the amount of sodium in your diet: kidney problems, heart failure, high blood pressure, swelling hands/ankles/feet. Before using this medication, tell your doctor or pharmacist your medical history, especially of: stomach/intestine/bowel problems (such as inflammatory bowel disease, bowel obstruction, chronic constipation, fecal impaction), low level of potassium in the blood. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Older adults may be at greater risk for severe constipation. This medication must not be given by mouth to newborns, especially premature infants. Also, newborns with slow gut function must not use this drug. Caution is advised when using this medication rectally in newborns and children. They may be more sensitive to the side effects of this drug, especially severe constipation and intestinal problems. Tell your doctor if you are pregnant before using this medication. This medication does not pass into breast milk and is unlikely to harm a nursing infant. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Do not use any laxatives that contain sorbitol with this medication. Doing so may increase your risk of intestinal problems. See also Side Effects section.

OVERDOSE: This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: mental/mood changes, muscle weakness, fast/irregular heartbeat, slowed breathing, paralysis.