This study is looking at a condition called hyperkalemia, which means having high levels of potassium in the blood. Potassium is an important mineral in the body, but when levels become too high, it can cause health problems. The study will test a medicine called patiromer, which comes as a powder that is mixed with liquid and taken by mouth. The medicine is being tested in children who are younger than 12 years old and have high potassium levels in their blood. Some children in the study may be receiving a treatment called peritoneal dialysis, which is a way to help the kidneys remove waste from the body.
The purpose of this study is to see how well patiromer can lower potassium levels in young children over a period of 28 days when different amounts of the medicine are given. The study will also check how safe the medicine is for children and whether it causes any unwanted effects. During the study, children will take patiromer every day, and doctors will measure their potassium levels at different times, including on days 3, 7, 14, and 28. The medicine can be given through regular feeding or through feeding tubes if needed. Blood tests will be done to check not only potassium levels but also other important substances in the blood like magnesium, calcium, and other minerals to make sure they stay within healthy ranges.
The study is divided into two parts, and there is also an optional period where children can continue taking the medicine for a longer time if their doctor thinks it would be helpful. Throughout the study, doctors will carefully watch for any side effects and will check the children’s heart function, vital signs like blood pressure and heart rate, and other blood test results to ensure the medicine is working safely. Children taking certain other medicines for blood pressure or heart conditions must be on a stable dose before joining the study.
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