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NCT00939887 · ClinicalTrials.gov registry record · Phase 1
A Study Of Kappa Opioid Receptor Occupancy Of PF-04455242, Using PET (Positron Emission Tomography)
A Phase 1 study, sponsored by Pfizer.
- Terminated
- Registry status
- Phase 1
- Development phase
- 12
- Enrollment target
NCT00939887: Clinical Trial Phase 1 study, sponsored by Pfizer.
NCT00939887 is a Phase 1 study that was terminated before completion, run by Pfizer. The registered enrollment target is 12 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (80% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00939887, a Phase 1 study, was terminated before completion, sponsored by Pfizer.
- TERMINATED
- Registry status
- Phase 1
- Development phase
- 12 participants
- Enrollment target
Study Summary
This is a subject blind, investigator and sponsor open, randomized study consisting of 2 parts. Up to 15 healthy subjects will be included in the study. In the first part of the study the test retest reliability of the radiotracer \[11C\] PF 04767135 binding in man will be assessed. In the second part of this study, using \[11C\] PF 04767135, kappa opioid receptor occupancy (RO) will be assessed in up to three cohorts of subjects.
Interventions
- DRUG PF-04455242
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 12 participants |
| Start Date | 2009-09 |
| Est. Completion | 2009-12 |
| Phase | Phase 1 |
Why NCT00939887 stopped before completion
NCT00939887 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 12 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (80% lower).
The record links to 0 conditions, and to 1 intervention - of which PF-04455242 is the first listed.
NCT00939887 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00939887 about?
NCT00939887 is a clinical study titled "A Study Of Kappa Opioid Receptor Occupancy Of PF-04455242, Using PET (Positron Emission Tomography)". This is a subject blind, investigator and sponsor open, randomized study consisting of 2 parts. Up to 15 healthy subjects will be included in the study. In the first part of the study the test retest reliability of the radiotracer \[11C\] PF 04767135 binding in man will be assessed. In the second pa...
What is the current status of trial NCT00939887?
This trial is currently terminated. It is a Phase 1 study. The enrollment target is 12 participants. The study started on 2009-09. Estimated completion is 2009-12.
What interventions are being tested in trial NCT00939887?
The interventions under investigation include: PF-04455242 (DRUG).
Who is sponsoring clinical trial NCT00939887?
This trial is sponsored by Pfizer, which has 1,845 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00939887's enrollment target sits among peer trials
12 1852nd of 2000 higher than 90 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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