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RecruitingNCT06277128Updated Feb 26, 2024

A Study to Evaluate the Safety and Efficacy of WS016 in Patients With Hyperkalemia.

A Phase 2 interventional study of WS016 3g and WS016 6g in Hyperkalemia, sponsored by Waterstone Pharmaceutical (Wuhan) Co., LTD.. Recruiting at 26 sites in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-02-26.

Sponsored by Waterstone Pharmaceutical (Wuhan) Co., LTD. · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Apr 2024, 2 years 6 months ago, but the record still lists the study as recruiting.
  • Registered 4 months after the study started (first participant enrolled Sep 2023, registered Feb 2024).
  • Started Sep 2023; still recruiting 3 years 2 months later.
Phase
Phase 2
Study type
Interventional
Enrollment
140
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this clinical trial is to evaluate the efficacy of different doses of WS016(3g, 6g and 12g) orally administered three times a day for 48 hours (acute treatment phase) vs placebo in the treatment of hyperkalemia, and to evaluate the efficacy of WS016(3g, 6g and 12g) orally administered once daily for 12 days ( maintenance treatment phase) vs placebo in maintaining normokalemia in participants have returned to normokalemia after the acute treatment phase.

Read the detailed description

The study plan includes approximately 140 participants who will be randomly assigned to the WS016 and placebo treatment groups. Participants will begin a 48-hour acute treatment phase with three times-daily oral administrations. After the 48-hour acute treatment, participants have returned to normokalemia will be randomly assigned again to enter a 12-day maintenance treatment phase with once-daily oral administration.

02

Conditions studied

  • Hyperkalemia

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03

In context

Hyperkalemia

133 studies on the registry are indexed under Hyperkalemia; 25 are open to participants now.

This study's planned enrollment of 140 is above the median of 87 across 102 interventional studies indexed under Hyperkalemia.

Browse Hyperkalemia studies →

Lead sponsor

Waterstone Pharmaceutical (Wuhan) Co., LTD. is the lead sponsor of 4 studies on the registry; 3 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Aged ≥18 years old, male or female;
  2. The average blood potassium value measured by i-STAT for 2 consecutive times at screening is >5.0 mmol/L and ≤6.5 mmol/L (with an interval of 60±10 minutes between the 2 measurements);
  3. Participants must provide for this trial, be able to maintain good communication with the investigator and comply with various requirements of the clinical trial (planned visits, laboratory tests, and other trial procedures, etc.).

Exclusion criteria

Exclusion Criteria:

  1. Pseudohyperkalemia, such as blood samples hemolysis caused by improper blood collection methods (e.g., tight tourniquet, excessive local massage, repeated clenching of the hand and release), participants with severe leukocytosis (>50×10\^9/L) or thrombocytosis (>500×10\^9/L);
  2. Participants with hyperkalemia who require emergency treatment according to investigators assessment: e.g., with significant abnormalities on (ECG) (e.g., flattened or absent P wave, widened QRS complex), or neuromuscular system symptoms;
  3. Participants with symptomatic or uncontrolled atrial fibrillation, or asymptomatic persistent ventricular tachycardia (participants with controlled atrial fibrillation after drug treatment may be allowed to participate after assessment by the investigator);
  4. Type 1 diabetes mellitus, or participants who developed diabetic ketoacidosis within 1 month before screening;
  5. Participants with severe swallowing dysfunction, moderate to severe gastrointestinal dysfunction, or major gastrointestinal surgery (e.g., bariatric surgery or colectomy);
  6. Participants who are receiving maintenance hemodialysis or peritoneal dialysis;
  7. Participants who received sodium polystyrene sulfonate, calcium polystyrene sulfonate, patiromer sorbitex calcium, or sodium zirconium cyclosilicate within 3 days before the first administration of the study drug;
  8. Participants who have undergone coronary artery bypass grafting, percutaneous interventional therapy (such as heart, cerebrovascular, aortic) or major surgeries including thoracic and cardiac surgery within 3 months prior to screening or are expected to undergo these procedures during the study period;
  9. Participants who were hospitalized due to acute exacerbation of heart failure within 3 months before screening.
  10. Participants who have undergone or are expected to undergo heart or kidney transplantation during the study period;
  11. Participants with who are receiving antineoplastic treatment, or have uncontrolled systemic diseases or mental illnesses, and are evaluated by the investigators not suitable for participation in this study;
  12. Participants with a of less than 3 months;
  13. Participants who test positive for antibodies, syphilis antibodies, virus (HCV) antibodies, or surface antigen (HBsAg) with serum hepatitis B virus (HBV) -DNA ≥2000 IU/mL (only in HBeAg-positive patients) at screening;
  14. Pregnant or breastfeeding women, or female participants who have had unprotected sexual intercourse within the past two weeks, or female participants who test positive for pregnancy; participants (or their partners) who have plans to conceive or donate sperm/ovum during the entire study period and 6 months after study completion, and are unwilling to use one or more measures during the study period and 6 months after study completion.
  15. Participants with any factors that are evaluated by the investigator, may affect the participant's ability to provide or comply with the study protocol, or may affect the trial results or participant safety.
Terms in these criteria, in plain language(8)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
140 participants (estimated)

Study arms

  • Experimental
    WS016 3g

    Drug: WS016 3g

  • Experimental
    WS016 6g

    Drug: WS016 6g

  • Experimental
    WS016 12g

    Drug: WS016 12g

  • Placebo comparator
    Matching Placebo

    Drug: Matching Placebo

Interventions

  • Acute treatment phase: WS016, oral, 3g , three times a day for 48 hours; Maintenance treatment phase: WS016, oral, 3g, once daily for 12 days.

  • Acute treatment phase: WS016, oral, 6g , three times a day for 48 hours; Maintenance treatment phase: WS016, oral, 6g, once daily for 12 days.

  • Acute treatment phase: WS016, oral, 12g , three times a day for 48 hours; Maintenance treatment phase: WS016, oral, 12g, once daily for 12 days.

  • DrugMatching Placebo

    Acute treatment phase: Matching Placebo, oral, three times a day for 48 hours; Maintenance treatment phase: Matching Placebo, oral, once daily for 12 days.

06

What researchers measure

Primary outcomes

  1. Exponential rate of change in serum potassium(S-K) levels during the acute treatment phase

    Time frame: Through the initial 48-hour acute treatment phase (from baseline to hour 48)

  2. Exponential rate of change in S-K levels during the maintenance treatment phase

    Time frame: Through 12 days of maintenance treatment phase (from Day 3 to Day 15)

Secondary outcomes

  1. Mean change in S-K levels during the acute treatment phase

    The mean change in S-K levels during the acute treatment phase compared to baseline

    Time frame: Through the initial 48-hour acute treatment phase

  2. Proportion of participants recover from hyperkalemia

    The percentage of participants whose S-K levels return to normal during the acute treatment phase

    Time frame: Through the initial 48-hour acute treatment phase

  3. Time to normalization in S-K levels

    The time(hours) it takes for participants' S-K levels to return to normal during the acute treatment phase

    Time frame: Through the initial 48-hour acute treatment phase

  4. Proportion of patients remaining normokalemic

    The percentage of participants whose S-K levels remain within the normal range (3.5-5.0 mmol/L) at the end of the maintenance treatment phase

    Time frame: Day 15

  5. Mean change in S-K levels during the maintenance treatment phase

    The mean change in S-K levels during the maintenance treatment phase compared to baseline

    Time frame: Through 12 days of maintenance treatment phase (from Day 3 to Day 15)

07

Study locations

26 of 26 sites recruiting
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 26, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06277128
Lead sponsor
Waterstone Pharmaceutical (Wuhan) Co., LTD.
Responsible party
Sponsor
First posted
Feb 26, 2024
Start date
Sep 11, 2023
Primary completion
Apr 18, 2024 (estimated)
Completion
Aug 4, 2024 (estimated)
Last update
Feb 26, 2024

Study contacts

Waterstone Medical Center
Contact
mpr2024_waterstone@waterstonepharma.com
+86 27+87531661

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: WS016

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