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Effects of MNTX on CYP450 2D6 in Metabolizers of Dextromethorphan

A Phase I, Randomized, Open-Label, Active- and Placebo-Controlled Parallel Group Study of the Effect of Subcutaneous and Intravenous Methylnaltrexone on CYP450 2D6 Activity in Healthy Extensive Metabolizers of Dextromethorphan

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01367535
Enrollment
54
Registered
2011-06-07
Start date
2006-03-31
Completion date
2006-08-31
Last updated
2019-11-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Adults

Brief summary

This study is a single-center, randomized, open-label, active and placebo-controlled, parallel-group, conducted in healthy male volunteers who have been shown to be extensive metabolizers of dextromethorphan.

Interventions

Sponsors

Bausch Health Americas, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

1. Healthy males between the ages of 18 and 55 2. Non-Smokers 3. Body weight range form 154-220 lbs 4. No history of clinically significant metabolic disorders.

Exclusion criteria

1. Any history of low CYP450 2D6 activity 2. History of alcohol abuse or recreational drugs 3. History of any clinically significant disease or condition affecting a major organ system 4. Donation or loss of blood, 60 days proceeding to screening visit.

Design outcomes

Primary

MeasureTime frameDescription
Plasma Concentration of MNTX4 monthsThe objective of this study is to assess the effect of SC or IV doses of MNTX on CYP450 2D6 activity.

Secondary

MeasureTime frameDescription
Plasma Concentration of Paroxetine4 monthsThe objective of this study is to assess the effect of SC or IV doses of MNTX on CYP450 2D6 activity.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026