It is very important that your doctor check you or your child closely to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Hypokalemia (low potassium in the blood) may occur while you are using this medicine. Check with your doctor right away if you have the following symptoms: confusion, dry mouth, increased thirst, irregular heartbeat, irritability, muscle cramps, nausea or vomiting, or shortness of breath.
This medicine may cause a serious stomach or bowel problem, called intestinal necrosis. This is more likely to occur if you have a history of bowel disease, bowel surgery, low blood volume, kidney problems or if you take sorbitol together with this medicine. Tell your doctor right away if you or your child have severe constipation, severe stomach pain, bloody, black, or tarry stools, or vomit blood or a material that looks like coffee grounds.
Tell your doctor if you have unexplained weight gain or edema (fluid retention or body swelling) while using this medicine.
This medicine may cause lung or breathing problems (eg, bronchitis, bronchopneumonia) when you inhale its powder form. It may also increase your risk of having aspiration. Take this medicine in an upright position to prevent this. Talk to your doctor if you have questions.
If you are taking aluminum or magnesium-containing antacids or laxatives, talk to your doctor first before using them together with sodium polystyrene sulfonate. These medicines may keep sodium polystyrene sulfonate from working properly and may cause serious side effects.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.