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ClinicalTrials.gov public records Last synced Oct 20, 2026, 11:06 AM EDT

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Showing 1–24 of 28 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: RDX5791 Clear all
Recruiting Phase 3 Interventional

A 26-Wk Study to Assess Safety & Efficacy of Tenapanor for T/t of Chronic Idiopathic Constipation in Adults

NCT07382167
View directory record Official record
Conditions
Chronic Idiopathic Constipation (CIC)
Interventions
Tenapanor 5 mg BID, Tenapanor 25 mg BID, Tenapanor 50 mg BID, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 80 Years
Enrollment
692 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
109
States / cities
Foley, Alabama • Saraland, Alabama • Chandler, Arizona + 98 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 4 Interventional Results available

A Long-Term Study of Tenapanor Alone or in Combination With Sevelamer in Patients With CKD on Dialysis and HP

NCT03988920
View directory record Official record
Conditions
Hyperphosphatemia, End Stage Renal Disease
Interventions
Tenapanor, Sevelamer Carbonate
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
Not listed
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Houston, California
Source: ClinicalTrials.gov public record
Updated Mar 29, 2023 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

To Evaluate the Effect of AZD1722 on the Pharmacokinetics of Oral Midazolam in Healthy Volunteers

NCT02140268
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Midazolam, AZD1722, AZD1722 and Midazolam
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 50 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of Tenapanor to Treat Hyperphosphatemia in ESRD Patients on Dialysis

NCT03427125
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Tenapanor, Placebo, Sevelamer Carbonate
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 80 Years
Enrollment
1,559 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
The Bronx, New York • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 29, 2023 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2Phase 3 Interventional Results available

The Efficacy of AZD1722 in Constipation Predominant Irritable Bowel Syndrome (IBS-C)

NCT01923428
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
AZD1722, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
356 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
4
States / cities
Boulder, Colorado • Greensboro, North Carolina • Winston-Salem, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 3 Interventional

Study to Assess Safety and Efficacy of Tenapanor for Treatment of IBS-C in Pediatric Patients 12 to Less Than 18 Years

NCT05643534
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Tenapanor 50 MG, Tenapanor 25 mg bid, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
12 Years to 17 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
39
States / cities
Foley, Alabama • Tucson, Arizona • Little Rock, Arkansas + 34 more
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 3 Interventional Results available

A 26-Week Study to Evaluate the Efficacy and Safety of Tenapanor in IBS-C

NCT02686138
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
593 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
117
States / cities
Dothan, Alabama • Foley, Alabama • Huntsville, Alabama + 98 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2 Interventional Results available

Pharmacodynamic Study of AZD1722 in End-stage Renal Disease Patients on Hemodialysis

NCT01764854
View directory record Official record
Conditions
End Stage Renal Disease, Chronic Kidney Disease Stage 5, ESRD
Interventions
AZD1722 (in-patient), Placebo (in-patient), AZD1722 (out-patient), Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 80 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
3
States / cities
Tempe, Arizona • Denver, Colorado • Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 10, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 3 Interventional Results available

An 8-Week Study to Evaluate Tenapanor in the Treatment of Hyperphosphatemia in End-Stage Renal Disease Patients on Hemodialysis (ESRD-HD)

NCT02675998
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 80 Years
Enrollment
219 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
32
States / cities
Huntsville, Alabama • Riverside, California • Denver, Colorado + 28 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Study to Examine the Pharmacodynamics of Different AZD1722 Formulations

NCT02249936
View directory record Official record
Conditions
Healthy
Interventions
AZD1722, Omeprazole
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
19 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 26, 2014 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Study to Evaluate the Efficacy of Tenapanor as Adjunctive Therapy to Phosphate Binder Therapy

NCT03824587
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Tenapanor, Placebo, Phosphate Binder Agents
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 80 Years
Enrollment
236 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
48
States / cities
Huntsville, Alabama • Pine Bluff, Arkansas • Beverly Hills, California + 41 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2023 · Synced Oct 20, 2026, 11:06 AM EDT
Active, not recruiting Phase 3 Interventional

Assessing Tenapanor as a Treatment of CF-related Constipation.

NCT06810167
View directory record Official record
Conditions
Cystic Fibrosis, Constipation
Interventions
Tenapanor
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2 Interventional Results available

Dose Finding Study to Treat High Phosphate Levels in the Blood.

NCT02081534
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
AZD1722, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 85 Years
Enrollment
162 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
16
States / cities
Downey, California • Los Angeles, California • Sacramento, California + 13 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

D5611C00003 - Food Interaction Study With AZD1722 Tablet in Healthy Subjects

NCT02226783
View directory record Official record
Conditions
Healthy Volunteers Food Interaction Study
Interventions
AZD1722 salt tablet, AZD1722 free base tablet, AZD1722 free base tablet + Omeprazole
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 4 Interventional Results available

Study to Evaluate the Use of Tenapanor as Core Therapy in the Treatment of Hyperphosphatemia

NCT04549597
View directory record Official record
Conditions
Chronic Kidney Disease Requiring Chronic Dialysis, Hyperphosphatemia
Interventions
Tenapanor
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 90 Years
Enrollment
333 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Lauderdale Lakes, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2023 · Synced Oct 20, 2026, 11:06 AM EDT
Enrolling by invitation Phase 3 Interventional

Safety Study of Tenapanor for the Treatment of Pediatric Patients (6 to Less Than 18 Years Old) With IBS-C

NCT05905926
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Tenapanor
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
6 Years to 18 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2031
U.S. locations
27
States / cities
Foley, Alabama • Anaheim, California • Doral, Florida + 24 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Novel Approach for Reducing Hyperoxaluria and Kidney Stone Risk.

NCT06481150
View directory record Official record
Conditions
Hyperoxaluria
Interventions
Tenapanor, Placebo
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 99 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Safety and Efficacy of RDX5791 for the Treatment of Constipation Predominant Irritable Bowel Syndrome (IBS-C)

NCT01340053
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
RDX5791
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
186 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
16
States / cities
San Diego, California • Jupiter, Florida • Pinellas Park, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2019 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 2 Interventional

4-Week, Multi-center Dose-Ranging Study for the IBS-C in Pts. 6 to <12 Yrs

NCT06553547
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
6 Years to 11 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
20
States / cities
Little Rock, Arkansas • Hartford, Connecticut • Miami, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Recruiting Phase 2 Interventional

Tenapanor in Synucleinopathy-Related Constipation

NCT06460038
View directory record Official record
Conditions
Synucleinopathy, Parkinson's Disease
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Cedar Valley Digestive Health Center
Other
Eligibility
50 Years to 89 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Waterloo, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 10, 2025 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 3 Interventional Results available

A Long-Term Safety Study of Tenapanor for the Treatment of IBS-C

NCT02727751
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
Tenapanor
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
312 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 9, 2020 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 4 Interventional

Effect of Tenapanor on the Metagenomics and Metabolomics of Patients With Irritable Bowel Syndrome With Constipation

NCT05995899
View directory record Official record
Conditions
IBS, IBS - Irritable Bowel Syndrome
Interventions
Tenapanor
Drug
Lead sponsor
Kyle Staller, MD, MPH
Other
Eligibility
18 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Study to Examine the Effect of Renvela on the Pharmacodynamics of AZD1722

NCT02346890
View directory record Official record
Conditions
Healthy
Interventions
AZD1722, Renvela
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
19 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 27, 2015 · Synced Oct 20, 2026, 11:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

To Assess the Effect of AZD1722 on the Pharmacokinetics of Cefadroxil in Healthy Volunteers

NCT02140281
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Treatment A (cefadroxil alone), Treatment B - AZD1722 followed by cefadroxil
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Days to 50 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Oct 20, 2026, 11:06 AM EDT