# A Study Of Kappa Opioid Receptor Occupancy Of PF-04455242, Using PET (Positron Emission Tomography)

> **NCT00939887** · PHASE1 · TERMINATED · sponsor: **Pfizer** · enrollment: 12 (actual)

## Conditions studied

- Bipolar Disorder
- Depression

## Interventions

- **DRUG:** PF-04455242

## Key facts

- **NCT ID:** NCT00939887
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2009-09
- **Primary completion:** 2009-12
- **Final completion:** 2009-12
- **Target enrollment:** 12 (ACTUAL)
- **Why stopped:** This study was terminated on January 6, 2010, due to toxicology findings in animals exposed to PF-04455242 for three months.
- **Last updated:** 2010-02-08


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00939887

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00939887, "A Study Of Kappa Opioid Receptor Occupancy Of PF-04455242, Using PET (Positron Emission Tomography)". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT00939887. Licensed CC0.

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