Open-label Safety and Efficacy of Sodium Zirconium Cyclosilicate for up to 12 Months

Multicenter, Multi-Dose, Open-Label Maintenance of Long-Term Safety and Efficacy of Sodium Zirconium Cyclosilicate (ZS) in Hyperkalemia

The Open-Label Maintenance Study contains an Acute Phase, in which subjects will be dosed with ZS 10 g three times daily (tid) for 24 to 72 hours, followed by a long-term Maintenance Phase.

Study Overview

• Status: Completed
• Conditions: Hyperkalemia
• Intervention / Treatment: Drug: Sodium Zirconium Cyclosilicate

Detailed Description

Subjects with 2 consecutive i STAT potassium values 5.1 mmol/L will enter the Acute Phase and receive ZS 10 g tid for 24 to 72 hours, depending on potassium values. Once normokalemia (i STAT potassium between 3.5 and 5.0 mmol/L, inclusive) is restored (whether after 24, 48 or 72 hours), subjects will be enrolled in the Maintenance Phase to be dosed with ZS at a starting dose of 5 g qd. Potassium (i STAT and central laboratory) will be measured weekly throughout the first month of study and every 4 weeks thereafter through Month 12. During the Maintenance Phase, the ZS dose may be increased or decreased in increments/decrements of 5 g qd up to a maximum of 15 g qd or a minimum of 5 g every other day based on i STAT potassium measurements as outlined below:

• > 5.0 mmol/L while receiving 5 g qd or 5 g every other day or > 5.5 mmol/L while receiving 10 g qd: increase ZS dose in 5 g qd increments to a maximum dose of 15 g qd

.• Between 3.0 and 3.4 mmol/L, inclusive: decrease ZS dose in 5 g qd decrements to a minimum dose of 5 g every other day; if a subject's i STAT potassium value remains between 3.0 and 3.4 mmol/L, inclusive, on the ZS 5 g every other day dose, the subject will be withdrawn from the study and receive standard of care treatment.

There is no limit to the number of dose titrations allowed. Subjects will receive up to 12 months of treatment with open-label ZS.

• Study Type: Interventional
• Enrollment (Actual): 751
• Phase: Phase 3

Contacts and Locations

Study Locations

• Australia
  • New South Wales
    • Gosford, New South Wales, Australia, 2250
  • Queensland
    • Woolloongabba, Queensland, Australia, 4102
  • Victoria
    • Heidelberg, Victoria, Australia, 3084
    • Melbourne, Victoria, Australia, 3073
    • Parkville, Victoria, Australia, 3050
• Germany
  • Berlin, Germany, 13353
  • Stuttgart, Germany, 70376
• Netherlands
  • Amsterdam, Netherlands, 1105 AZ
• Romania
  • Lasi, Romania, 700503
• South Africa
  • Cape Town, South Africa, 7925
  • Meyerspark, South Africa
  • Port Elizabeth, South Africa, 6001
  • Somerset West, South Africa, 7130
• United Kingdom
  • Leicester, United Kingdom, LE1 9HN
• United States
  • Alabama
    • Scottsboro, Alabama, United States, 35768
  • Arizona
    • Tempe, Arizona, United States, 85284
    • Tucson, Arizona, United States, 85724
  • California
    • Chula Vista, California, United States, 90717
    • Los Angeles, California, United States, 90022
    • Paramount, California, United States, 90723
    • Riverside, California, United States, 92505
    • Sacramento, California, United States, 95825
    • Whittier, California, United States, 90603
  • Colorado
    • Denver, Colorado, United States, 80230
  • Florida
    • Brandon, Florida, United States, 33511
    • DeLand, Florida, United States, 32720
    • Hudson, Florida, United States, 34667
    • Lauderdale Lakes, Florida, United States, 33313
    • Miami, Florida, United States, 33125
    • Miami, Florida, United States, 33015
    • Miami Lakes, Florida, United States, 33018
    • New Smyrna, Florida, United States, 32168
    • New Smyrna Beach, Florida, United States, 32168
    • Tampa, Florida, United States, 33614
    • Winter Park, Florida, United States, 32789
  • Georgia
    • Columbus, Georgia, United States, 31901
  • Illinois
    • Evergreen Park, Illinois, United States, 60805
    • Joliet, Illinois, United States, 60435
  • Kentucky
    • Paducah, Kentucky, United States, 42003
  • Louisiana
    • Shreveport, Louisiana, United States, 71101
  • Michigan
    • Chesterfield, Michigan, United States, 48047
  • Missouri
    • Kansas City, Missouri, United States, 64411
    • Saint Louis, Missouri, United States, 63110
  • New York
    • Great Neck, New York, United States, 11021
  • Rhode Island
    • Providence, Rhode Island, United States, 02903
  • South Carolina
    • Orangeburg, South Carolina, United States, 29118
    • Sumter, South Carolina, United States, 29150
  • Tennessee
    • Chattanooga, Tennessee, United States, 37408
  • Texas
    • San Antonio, Texas, United States, 78229
    • San Antonio, Texas, United States, 78215
  • Utah
    • Saint George, Utah, United States, 84770

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Provision of written informed consent.
• Over 18 years of age.
• Two consecutive i STAT potassium values, measured 60 (+/- 15) minutes apart, both >/= 5.1 mmol/L and measured within 1 day before the first dose of ZS on Acute Phase Study Day 1.
• Ability to have repeated blood draws or effective venous catheterization.
• Women of childbearing potential must be using 2 forms of medically acceptable contraception (at least 1 barrier method) and have a negative pregnancy test at Acute Phase Study Day 1. Women who are surgically sterile or those who are postmenopausal for at least 2 years are not considered to be of childbearing potential.
• Controlled diabetic subjects.

Exclusion Criteria:

• Pseudohyperkalemia signs and symptoms, such as hemolyzed blood specimen due to excessive fist clenching to make veins prominent, difficult or traumatic venipuncture, or history of severe leukocytosis or thrombocytosis.
• Subjects treated with lactulose, rifaximin, or other non-absorbed antibiotics for hyperammonemia within 7 days prior to first dose of ZS on Acute Phase Study Day 1.
• Subjects treated with sodium polystyrene sulfonate (SPS; eg, Kayexalate®) or calcium polystyrene sulfonate (eg, Resonium®) within 3 days prior to first dose of ZS on Acute Phase Study Day 1.
• Subjects with a life expectancy of less than 12 months.
• Subjects who are severely physically or mentally incapacitated and who, in the opinion of investigator, are unable to perform the subjects' tasks associated with the protocol.
• Women who are pregnant, lactating, or planning to become pregnant.
• Subjects with diabetic ketoacidosis.
• Presence of any condition which, in the opinion of the investigator, places the subject at undue risk or potentially jeopardizes the quality of the data to be generated.
• Known hypersensitivity or previous anaphylaxis to ZS or to components thereof.
• Treatment with a drug or device within the last 30 days that has not received regulatory approval at the time of study entry.
• Subjects with cardiac arrhythmias that require immediate treatment.
• Subjects on dialysis.
• Subjects randomized into the previous ZS-002, ZS-003, ZS-004, or ZS-004E studies.
• Documented GFR <15 mL/min within 90 days prior to study entry.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: SUPPORTIVE_CARE
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

EXPERIMENTAL: Sodium Zirconium Cyclosilicate

Drug: Sodium Zirconium Cyclosilicate; Acute Phase Dosing: Sodium Zirconium Cyclosilicate 10 g three times daily (TID) for 24 to 72 Extended Dosing: Sodium Zirconium Cyclosilicate 5 g once daily (QD). Sodium Zirconium Cyclosilicate dose increased or decreased in increments/decrements of 5 g QD up to a maximum of 15 g QD or a minimum of 5 g every other day (QOD) based on i-STAT potassium measurements up to 12 months.; Other Names: ZS

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percent of Participants With Restoration of Normal Serum Potassium (S-K) Values (3.5 to 5.0 mmol/L, Inclusive) at the End of the Acute Phase	Percentage of subjects with S-K values between 3.5 and 5.0 mmol/L, inclusive at the end of the Acute Phase - ITT Population	72 Hours
Percentage of Participants With Mean S-K Values ≤ 5.1 mmol/L During Extended Dosing Phase Days 85 to 365	Percentage of subjects with mean S-K values ≤ 5.1 mmol/L during Extended Dosing Phase - ITT Population	Study Days 85 to 365

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Proportion of Subjects With Mean S-K Between 3.5 and 5.5 mmol/L, Inclusive Months 3 to 12	Proportion of Subjects with mean S-K between 3.5 and 5.5 mmol/L during Extended Dosing Phase - ITT Population	Study Days 85 to 365
Mean S-K Levels Months 3 to 12, Months 6 to 9, and Months 9 to 12.	Mean S-K levels months 3 to 12(EP Days 85, 113, 141, 176, 211, 239, 267, 295, 330, 365 and EOS),months 6 to 9, and months 9 to 12.	Study days 85 to 365

Collaborators and Investigators

• Sponsor: ZS Pharma, Inc.

Publications and helpful links

General Publications

• Roger SD, Lavin PT, Lerma EV, McCullough PA, Butler J, Spinowitz BS, von Haehling S, Kosiborod M, Zhao J, Fishbane S, Packham DK. Long-term safety and efficacy of sodium zirconium cyclosilicate for hyperkalaemia in patients with mild/moderate versus severe/end-stage chronic kidney disease: comparative results from an open-label, Phase 3 study. Nephrol Dial Transplant. 2021 Jan 1;36(1):137-150. doi: 10.1093/ndt/gfz285.

Study record dates

Study Major Dates

• Study Start (ACTUAL): June 30, 2014
• Primary Completion (ACTUAL): November 30, 2016
• Study Completion (ACTUAL): November 30, 2016

Study Registration Dates

• First Submitted: June 11, 2014
• First Submitted That Met QC Criteria: June 12, 2014
• First Posted (ESTIMATE): June 13, 2014

Study Record Updates

• Last Update Posted (ACTUAL): June 27, 2018
• Last Update Submitted That Met QC Criteria: May 29, 2018
• Last Verified: May 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Metabolic Diseases; Water-Electrolyte Imbalance; Hyperkalemia
• Other Study ID Numbers: ZS-005

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO