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A Study To Examine The Effects Of PF-04958242 On Ketamine-Induced Cognitive Impairment In Healthy Volunteers

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01749098
First Posted: December 13, 2012
Last Update Posted: March 10, 2014
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Pfizer
  Purpose
To assess if PF-04958242 can attenuate the ketamine-induced cognitive impairment in verbal learning and memory, episodic memory and spatial working memory in healthy volunteers.

Condition Intervention Phase
Schizophrenia Drug: PF-04958242 Drug: Ketamine Drug: Placebo Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Basic Science
Official Title: A Randomized, Subject And Investigator Blinded, Sponsor Open Placebo Controlled, 2 Way, Crossover Phase 1b Study To Examine The Effects Of PF-04958242 On Ketamine Induced Cognitive Impairment In Healthy Male Volunteers

Resource links provided by NLM:


Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Test score on the Hopkins Verbal Learning Test - Immediate Recall [ Time Frame: Day 5 ]

Secondary Outcome Measures:
  • Test score on the Weschler Digit Span Test [ Time Frame: Day 5 ]
  • Test score on the CogState N-back test [ Time Frame: Day 5 ]
  • Test score on the CogState Spatial Working memory test [ Time Frame: Day 5 ]
  • Test score on the CogState One Card Learning test [ Time Frame: Day 5 ]
  • Test score on the Hopkins Verbal Learning test - Delayed Recall [ Time Frame: Day 5 ]
  • Retrospective rating on the Positive and Negative Syndrome Scale -modified scale` [ Time Frame: Day 5 ]

Enrollment: 29
Study Start Date: December 2012
Study Completion Date: February 2014
Primary Completion Date: February 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: PF-04958242
PF-04958242 and ketamine
Drug: PF-04958242
PF-04958242, 0.35 mg orally administered capsule on Day 1 and 0.25 mg orally administered capsule on Days 2 - 5
Drug: Ketamine
At 60 minutes after the 0.25 mg dose of PF-04958242 on Day 5, Ketamine (0.23 mg/kg over 1 minute, followed by a maintenance rate of 0.58 mg/kg/hr for 75 minutes) will be infused.
Placebo Comparator: Placebo
Placebo and ketamine
Drug: Placebo
Placebo capsule orally administered on Days 1 - 5
Drug: Ketamine
At 60 minutes after Placebo on Day 5, Ketamine (0.23 mg/kg over 1 minute, followed by a maintenance rate of 0.58 mg/kg/hr for 75 minutes) will be infused.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   21 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Healthy male subjects 21 - 45 years old.
  • Able to read and write English as primary language.
  • Subjects who are willing to comply with study procedures.

Exclusion Criteria:

  • History of any substance abuse or dependence disorder meeting DSM-IV criteria and/or by SCID-NP within the past 12 months, with the exception of nicotine.
  • Known sensitivity to ketamine
  • Any history of DSM-IV Axis I psychiatric disorders, determined by SCID-NP interview or diagnoses in the view of the investigator.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01749098


Locations
United States, Connecticut
Pfizer Investigational Site
New Haven, Connecticut, United States, 06511
Pfizer Investigational Site
West Haven, Connecticut, United States, 06516
Sponsors and Collaborators
Pfizer
Investigators
Study Director: Pfizer CT.gov Call Center Pfizer
  More Information

Additional Information:
Responsible Party: Pfizer
ClinicalTrials.gov Identifier: NCT01749098     History of Changes
Other Study ID Numbers: B1701013
First Submitted: December 11, 2012
First Posted: December 13, 2012
Last Update Posted: March 10, 2014
Last Verified: March 2014

Keywords provided by Pfizer:
PF-04958242
ketamine
cognition
healthy volunteers

Additional relevant MeSH terms:
Schizophrenia
Cognitive Dysfunction
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Cognition Disorders
Neurocognitive Disorders
Ketamine
Analgesics
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anesthetics, Dissociative
Anesthetics, Intravenous
Anesthetics, General
Anesthetics
Central Nervous System Depressants
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action