Study of Oral Sodium Zirconium Cyclosilicate to Treat High Blood Potassium in Children Under 18 Years

What this Trial Is About

Researchers are evaluating sodium zirconium cyclosilicate SZC to treat hyperkalaemia in children under 18 years old. This Phase 3, international, open-label study aims to assess the effectiveness, safety, and tolerability of SZC. The study enrolls about 140 children from multiple countries, starting with age groups 6 to under 12 years and 12 to under 18 years. Later, younger age groups may be included based on data reviews. The goal is to see how well SZC controls potassium levels in children with this condition. The study includes three treatment phases Correction Phase CP, Maintenance Phase MP, and Long-Term Maintenance Phase LTMP. In the CP, participants receive fixed doses of SZC orally three times daily for up to 3 days until potassium levels normalize. Doses are adjusted based on body weight and age groups, with possible dose increases after safety reviews. Those who achieve normal potassium enter the 28-day MP with once daily SZC, where doses can be adjusted to maintain potassium levels. Participants may continue in the LTMP using the same dosing approach with monthly visits. Participants undergo regular monitoring including blood tests, urine tests, and ECGs to assess potassium levels, electrolytes, and heart rhythm. Researchers track safety, tolerability, potassium control, and other biochemical changes throughout the phases. The study lasts about 28 weeks, including treatment and a safety follow-up visit one week after the last dose. Data collected will help evaluate SZCs role in managing hyperkalaemia in children.

An Open-label Study to Assess Safety and Efficacy of SZC in Paediatric Patients With Hyperkalaemia