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Showing 1–24 of 44 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Methylnaltrexone bromide Clear all
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 11, 2026, 11:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Tolerance and Pharmacokinetics Study of MNTX Tablets

NCT01366339
View directory record Official record
Conditions
Normal Healthy Volunteers
Interventions
Oral methylnaltrexone, Oral placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 11, 2026, 11:52 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Methylnaltrexone on GI Transit in Healthy Volunteers

NCT01055704
View directory record Official record
Conditions
Gastric Motility Disorder
Interventions
Methylnaltrexone only, Codeine only, Methylnaltrexone + codeine, Placebo + placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 24, 2012 · Synced Sep 11, 2026, 11:52 PM 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 – 2027
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluate the Pharmacokinetics (PK) of Methylnaltrexone (MNTX) in Healthy Adult Subjects

NCT01366326
View directory record Official record
Conditions
Healthy Adult Subjects
Interventions
Methylnaltrexone bromide
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 28, 2019 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT
Completed Phase 4 Interventional Results available

Study Evaluating Subcutaneous Methylnaltrexone For Treatment Of Opioid-Induced Constipation In Patients With Advanced Illness

NCT00672477
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
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
29
States / cities
Mobile, Alabama • Laguna Hills, California • Lancaster, California + 23 more
Source: ClinicalTrials.gov public record
Updated Mar 7, 2018 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT
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 11, 2026, 11:52 PM EDT
Terminated Phase 4 Interventional Results available

Naloxegol to Prevent Lower Gastrointestinal Paralysis in Critically Ill Adults Administered Opioids

NCT02977286
View directory record Official record
Conditions
Constipation
Interventions
Naloxegol Oral Tablet, Placebo Oral Tablet, Docusate Sodium 100 Mg oral capsule [Colace], Senna 217 Mg Oral Tablet, Polyethylene Glycols, Bisacodyl 10 mg Suppository, Magnesium Citrate Oral Liquid Product, Methylnaltrexone
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 15, 2023 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetics and Bioavailability Comparison of Two Different Formulations of MNTX Tablets

NCT01366352
View directory record Official record
Conditions
Normal Volunteers
Interventions
MNTX tablet (Formulation 1), MNTX tablet (Formulation 2)
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 45 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 11, 2026, 11:52 PM EDT
Completed Phase 3 Interventional

Study of Methylnaltrexone (MNTX) for the Relief of Constipation

NCT00402038
View directory record Official record
Conditions
Advance Illness Patients With OIC
Interventions
SC Methylnaltrexone, SC Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Sep 11, 2026, 11:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Cimetidine on the Single-Dose PK of IV- Administered MNTX

NCT01366378
View directory record Official record
Conditions
Healthy Adult Subjects
Interventions
methylnaltrexone
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Nov 26, 2019 · Synced Sep 11, 2026, 11:52 PM EDT
Completed Phase 3 Interventional Results available

Study Evaluating Long-Term Safety of MOA-728 in Participants With Opioid-Induced Constipation

NCT00804141
View directory record Official record
Conditions
Constipation
Interventions
N-methylnaltrexone bromide (MOA-728)
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,040 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
94
States / cities
Birmingham, Alabama • Chandler, Arizona • Mesa, Arizona + 76 more
Source: ClinicalTrials.gov public record
Updated Oct 17, 2019 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT
Withdrawn Phase 4 Interventional

Study Evaluating Safety & Efficacy of Subcutaneous Methylnaltrexone on Opioid-Induced Constipation in Cancer Subjects

NCT00858754
View directory record Official record
Conditions
Opioid-Induced Constipation
Interventions
methylnaltrexone, placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 90 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
4
States / cities
Laguna Hills, California • Lancaster, California • Flat Rock, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2019 · Synced Sep 11, 2026, 11:52 PM 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 11, 2026, 11:52 PM EDT