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Patiromer for

Phase 3

Hyperkalemia | Small molecule | Nephrology |Fresenius Medical Care AG|Last Updated: Apr 13, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedPLACEBO_CONTROLLED
Total Trials1
Total Enrollment262

FDA Designations

No designations recorded

Clinical trial landscape

Patiromer for · 1 trial · 2 indications

Phase 3 1
NCT05136664Trial Evaluating the Efficacy and Safety of Patiromer in Chinese SubjectsHyperkalemia
COMPLETED262 Analytics
PHASE3COMPLETED
Trial Evaluating the Efficacy and Safety of Patiromer in Chinese Subjects
HyperkalemiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A: Change from baseline in the serum potassium (sK+)
Week 4

Measured in milliequivalents per litre (mEq/L)

Part B: Change from Week 4 in sK+
The earlier of: Week 8 or the date when RAASi therapy is first decreased or discontinued

Measured in mEq/L

Secondary Endpoints

Part A: Proportion of participants having an sK+ level between 3.8 and less than 5.1 mEq/L at Week 4
Week 4
Part B: Proportion of participants taking any RAASi medication at Week 12
Week 12
Part B: Proportion of subjects discontinuing/reducing RAASi medication due to hyperkalemia
From Week 4 to 2 weeks after the end of treatment
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Study Design & Arms

AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A: PatiromerEXPERIMENTALPart A: 4-week, single-arm patiromer treatment phase (4 weeks)
Part B: PlaceboPLACEBO_COMPARATORPart B: 8-week randomized, parallel group, placebo-controlled withdrawal phase
Part B: PatiromerEXPERIMENTALPart B: 8-week randomized, parallel group, placebo-controlled withdrawal phase

Interventions

NameTypeDescription
Patiromer Powder for Oral Suspension (Part A)DRUGParticipants initiate patiromer at an oral dose of 1 packet/day (8.4g/day as powder for suspension). The dose is adjusted ate the following visit based on local serum potassium (sK+) levels. The content of each packet should be mixed with water, apple or cranberry juice before administration.
Placebo (Part B)DRUGPlacebo is provided in packets, each containing 6 g of placebo as powder for suspension. Participants will take 1 packet per day, by mixing its content with water, apple or cranberry juice.
Patiromer Powder for Orals Suspension (Part B)DRUGParticipants will continue to receive the same number of packets established during Part A, but dose may be up- or down titrated depending on sK+ levels. The content of each packet should be mixed with water, apple or cranberry juice before administration.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites28

Inclusion Criteria: * \- Chinese subjects at least 18 years of age. * \- Chronic Kidney Disease (CKD) stage 3 and 4. * \- Mean of 2 measurement of serum potassium higher than 5.0 and lower than 6.5 mEq/L at baseline. * \- Subjects on any stable dose of at least 1 RAASi medication for at least 28 da...

Countries:China
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Competitive Landscape -Hyperkalemia 3 trials

Frequently asked questions about Patiromer for

What is patiromer used for?

Patiromer is used for hyperkalemia, a condition of elevated potassium levels in the blood. It is being developed for patients with chronic renal insufficiency who have hyperkalemia. The drug is currently in Phase 3 clinical development and is not yet approved for this use.

Who makes patiromer?

Patiromer is being developed by Fresenius Medical Care AG, a company traded on the New York Stock Exchange under the ticker symbol FMS. The company is conducting clinical trials to evaluate the efficacy and safety of patiromer in patients with hyperkalemia and chronic renal insufficiency.

What phase is patiromer in?

Patiromer is in Phase 3 clinical development. A Phase 3 trial has been completed, and the drug remains investigational, meaning it has not been approved by regulatory authorities. The completed trial enrolled 262 participants with hyperkalemia and chronic renal insufficiency.

What clinical trials is patiromer in?

Patiromer has one completed Phase 3 clinical trial with the identifier NCT05136664, titled 'Trial Evaluating the Efficacy and Safety of Patiromer in Chinese Subjects.' The trial enrolled 262 participants with hyperkalemia and chronic renal insufficiency in China. The trial was randomized and placebo-controlled.

Is patiromer FDA approved?

Patiromer is not FDA approved. It is an investigational drug currently in Phase 3 clinical development. A Phase 3 trial has been completed, but the drug has not received regulatory approval for the treatment of hyperkalemia.