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Showing 1–24 of 45 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Methylnaltrexone Clear all
Completed Phase 3 Interventional

Study Evaluating IV Methylnaltrexone for the Treatment of Post Operative Ileus

NCT00387309
View directory record Official record
Conditions
Post Operative Bowel Dysfunction
Interventions
Methylnaltrexone (MOA-728)
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
495 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
59
States / cities
Mobile, Alabama • Fort Smith, Arkansas • Chula Vista, California + 51 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study of Pharmacokinetics, Safety and Tolerability of Intravenous Methylnaltrexone Bromide

NCT01366365
View directory record Official record
Conditions
Healthy Adults
Interventions
methylnaltrexone, placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of MNTX on CYP450 2D6 in Metabolizers of Dextromethorphan

NCT01367535
View directory record Official record
Conditions
Healthy Adults
Interventions
SC Methylnaltrexone (MNTX), IV Methylnaltrexone (MNTX), Oral Paroxetine, SC Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Withdrawn Phase 3 Interventional

Effect of Methylnaltrexone (Relistor) on Digestion and Tolerance to Tube Feeding in Patients Treated With Opiates

NCT01360372
View directory record Official record
Conditions
Tube Feeding
Interventions
Methylnaltrexone, Saline injection
Drug
Lead sponsor
Drexel University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2015 · Synced Sep 2, 2026, 10:57 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Chronic Widespread Pain in HIV: Novel Mechanisms and Therapeutics

NCT04787848
View directory record Official record
Conditions
Chronic Widespread Pain
Interventions
Relistor Injectable Product
Drug
Lead sponsor
Florida International University
Other
Eligibility
19 Years to 65 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 2 Interventional Results available

Methylnaltrexone for Opioid-induced Constipation in Cancer Patients

NCT01004393
View directory record Official record
Conditions
Neoplasms, Constipation, Opioid-Related Disorders
Interventions
Methylnaltrexone bromide
Drug
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Feb 1, 2016 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 3 Interventional Results available

A Study of Oral Methylnaltrexone (MNTX) for the Treatment of Opioid-Induced Constipation (OIC) in Participants With Chronic, Non-Malignant Pain

NCT01186770
View directory record Official record
Conditions
Opioid-Induced Constipation
Interventions
Methylnaltrexone, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
804 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 5, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Not listed Phase 3 Interventional

Methylnaltrexone for Treatment of Opiate-Induced Constipation in the Intensive Care Unit

NCT01050595
View directory record Official record
Conditions
Opioid-induced Constipation
Interventions
Methylnaltrexone Bromide, Placebo-Normal Saline
Drug
Lead sponsor
St. John Health System, Michigan
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Southfield, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 14, 2010 · Synced Sep 2, 2026, 10:57 AM EDT
Recruiting Phase 4 Interventional

Methylnatrexone In Resectable Head and Neck Squamous Cell Carcinoma (MINK). A "Window of Opportunity" Pilot Study.

NCT06162377
View directory record Official record
Conditions
Head and Neck Squamous Cell Carcinoma
Interventions
Methylnaltrexone
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Withdrawn Phase 2Phase 3 Interventional

A Study of Methylnaltrexone Bromide (MNTX) in Participants With Advanced Pancreatic Cancer

NCT04083651
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
Methylnaltrexone bromide, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated May 6, 2021 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 3 Interventional Results available

A Study Evaluating Intravenous (IV) MOA-728 for the Treatment of Postoperative Ileus (POI) in Participants After Ventral Hernia Repair

NCT00528970
View directory record Official record
Conditions
Ileus
Interventions
MOA-728, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
374 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
75
States / cities
Benton, Arkansas • Colton, California • Laguna Hills, California + 62 more
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 4 Interventional Results available

Methylnaltrexone vs Naloxegol in the Treatment of Opioid-Induced Constipation

NCT03523520
View directory record Official record
Conditions
Constipation Drug Induced
Interventions
Methylnaltrexone Bromide 150 mg Oral Tablet, Methylnaltrexone Bromide 12 MG/0.6 ML Subcutaneous Solution [RELISTOR]_#1, Naloxegol 25 MG Oral Tablet
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 3 Interventional

Open-Label Treatment Extension of Protocol MNTX 302

NCT01367613
View directory record Official record
Conditions
Terminal Illness
Interventions
SC Methylnaltrexone
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 4 Interventional Results available

Effect of Methylnaltrexone on the PK/PD Profiles of Ticagrelor in Patients Treated With Morphine

NCT02403830
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Methylnaltrexone, Placebo, Morphine, Ticagrelor
Drug · Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 3 Interventional Results available

Study of Intravenous (IV) Methylnaltrexone Bromide (MNTX) in the Treatment of Post-Operative Ileus (POI)

NCT00401375
View directory record Official record
Conditions
Post-Operative Ileus (POI)
Interventions
Methylnaltrexone, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
524 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 2 Interventional Results available

Study of Subcutaneous Methylnaltrexone (MNTX) in the Treatment of Opioid-Induced Constipation During Rehabilitation After Orthopedic Procedures

NCT00640146
View directory record Official record
Conditions
Opioid-induced Constipation
Interventions
Methylnaltrexone bromide, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 4 Interventional Results available

Safety of Subcutaneous Methylnaltrexone for Opioid-Induced Constipation in Patients With Advanced Illness

NCT00672139
View directory record Official record
Conditions
Opioid-Induced Constipation
Interventions
Methylnaltrexone bromide
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
26
States / cities
Mobile, Alabama • Laguna Hills, California • Lancaster, California + 20 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2018 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Naloxone and Intravenous Methylnaltrexone Effects on Bladder Function

NCT01367561
View directory record Official record
Conditions
Healthy Males
Interventions
Naloxone, IV Methylnaltrexone (MNTX), Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2003
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetics, Safety, and Tolerability of Methylnaltrexone in Volunteers With Impaired Hepatic Function

NCT01367522
View directory record Official record
Conditions
Liver Dysfunction
Interventions
SC Methylnaltrexone (MNTX)
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetics and Bioavailability of Single Subcutaneous Doses of Methylnaltrexone Versus Intravenous Dose

NCT01367496
View directory record Official record
Conditions
Healthy Subjects
Interventions
SC Methylnaltrexone (MNTX), IV Methylnaltrexone (MNTX)
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Results available

Compassionate Use Study of Methylnaltrexone

NCT01368562
View directory record Official record
Conditions
Opioid-induced Constipation
Interventions
Methylnaltrexone
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 3 Interventional Results available

Study Evaluating Subcutaneous MOA-728 for the Treatment of Opioid-Induced Constipation (OIC) in Subjects With Chronic Non-Malignant Pain

NCT00529087
View directory record Official record
Conditions
Constipation
Interventions
N-methylnaltrexone bromide (MOA-728), placebo
Drug · Other
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
460 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
78
States / cities
Mobile, Alabama • Sun City, Arizona • Tucson, Arizona + 69 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 2 Interventional

Intravenous (IV) Methylnaltrexone (MNTX) in the Prevention of Post-Operative Ileus

NCT01367548
View directory record Official record
Conditions
Postoperative Ileus
Interventions
IV Methylnaltrexone (MNTX), Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional

Dasatinib, Bevacizumab, Paclitaxel in Patients With Advanced Malignancies

NCT01015222
View directory record Official record
Conditions
Advanced Cancer
Interventions
Dasatinib, Bevacizumab, Paclitaxel
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2021
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 22, 2022 · Synced Sep 2, 2026, 10:57 AM EDT