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Patiromer

Phase 3

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

Patiromer development status

Highest phase Phase 3
Registered trials 1 across 1 sponsor since Mar 2009

Patiromer target and mechanism

ModalitySmall molecule

Also known as Patiromer Powder for Oral Suspension (Part A)

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

Patiromer clinical trials

Patiromer · 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 4 trials

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN4PHASE3Sodium zirconium cyclosilicate
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Frequently asked questions about Patiromer

What is Patiromer for used for?

Patiromer for is being developed for the treatment of hyperkalemia, which is elevated potassium in the blood. The Phase 3 program studied it in adults with hyperkalemia and chronic renal insufficiency. It is a small molecule therapy in the nephrology therapeutic area.

Who is developing Patiromer for?

Patiromer for is being developed by Fresenius Medical Care AG, which trades under the ticker FMS. The company sponsored the Phase 3 trial evaluating the drug in Chinese subjects with hyperkalemia and chronic renal insufficiency.

What phase is Patiromer for in?

Patiromer for is in Phase 3 clinical development. The single registered trial, NCT05136664, was a Phase 3 study that has been completed. The drug is investigational and has not been approved for commercial use.

What clinical trials is Patiromer for in?

Patiromer for has been studied in one completed Phase 3 trial, NCT05136664, titled Trial Evaluating the Efficacy and Safety of Patiromer in Chinese Subjects. It enrolled 262 adults with hyperkalemia and chronic renal insufficiency in China and was randomized and placebo-controlled.

Is Patiromer for the same as Patiromer Powder for Oral Suspension (Part A)?

Yes, Patiromer for is also known as Patiromer Powder for Oral Suspension (Part A). Both names refer to the same investigational small molecule being developed by Fresenius Medical Care AG for hyperkalemia in patients with chronic renal insufficiency.