CI

At a glance

ClinicalIndex Comparison Record
Phase 4Completed· 366 enrolled
Drug / intervention
Sodium zirconium cyclosilicate +2 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04676646
NCT04676646Phase 4Completed

Phase IV, Double-Blind, Placebo-Controlled, Randomized-Withdrawal Trial Evaluating Sodium Zirconium Cyclosilicate (SZC) for the Management of Hyperkalaemia in Patients With Symptomatic Heart Failure With Reduced Ejection Fraction and Receiving Spironolactone

AstraZeneca·interventional·Posted Dec 21, 2020·Updated Jul 9, 2025

In Brief

A Phase 4 clinical trial evaluating Sodium zirconium cyclosilicate, Placebo, and 1 other intervention for Hyperkalaemia and Heart Failure With Reduced Ejection Fraction. Completed, enrolled 366 participants across 89 sites in 8 countries.

Detailed Summary

The main objective of this study is to evaluate the efficacy of SZC as compared with placebo in keeping potassium levels within the normal range (3.5-5.0 mEq/L) while on spironolactone ≥25 mg daily without assistance of rescue therapy for hyperkalaemia (HK).

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesBrazil, Canada, Czechia, Hungary, Poland, Spain, United Kingdom, United States
Collaborators--

Timeline

Phase 4CompletedFinished
202120222023202420252026
First PostedDec 21, 2020
Enrollment StartMar 8, 2021
Primary CompletionJul 15, 2024
TodayJul 2, 2026
Enrollment to primary: 3.4 yearsPosted 5.5 years ago

Interventions

Sodium zirconium cyclosilicatedrug

Investigational medicinal product

Placebodrug

Placebo comparator

Spironolactoneother

Background intervention. During the run-in phase, spironolactone will be initiated/uptitrated up to a maximum of 50 mg per day. During the randomized withdrawal phase the spironolactone dose at the end of the run-in phase will be maintained.