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CompletedNCT01749098Updated Nov 21, 2019

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

A Phase 1 interventional study of PF-04958242 and Ketamine in Schizophrenia, sponsored by Biogen. Completed at 2 sites in United States. Open to male participants aged 21 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-11-21.

Sponsored by Biogen · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
29
Allocation
Randomized
Ages
21 Years to 45 Years
Sex
Male
01

Study summary

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.

Read the detailed description

This study was previously posted by Pfizer, Inc. Sponsorship of the trial was transferred to Biogen.

02

Conditions studied

  • Schizophrenia

Keywords

  • PF-04958242
  • ketamine
  • cognition
  • healthy volunteers
03

In context

Schizophrenia

3,471 studies on the registry are indexed under Schizophrenia; 472 are open to participants now.

This study's enrollment of 29 is below the median of 70 across 2,872 interventional studies indexed under Schizophrenia.

Browse Schizophrenia studies →

Lead sponsor

Biogen is the lead sponsor of 494 studies on the registry; 22 are open to participants now.

Of its 98 completed or terminated interventional studies of FDA-regulated products, 49 (50%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years to 45 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

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

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.
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Participant, Investigator)
Enrollment
29 participants (actual)

Study arms

  • Experimental
    PF-04958242

    PF-04958242 and ketamine

    Drug: PF-04958242 · Drug: Ketamine

  • Placebo comparator
    Placebo

    Placebo and ketamine

    Drug: Placebo · Drug: Ketamine

Interventions

  • DrugPF-04958242

    PF-04958242, 0.35 mg orally administered capsule on Day 1 and 0.25 mg orally administered capsule on Days 2 - 5

  • DrugKetamine

    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.

  • DrugPlacebo

    Placebo capsule orally administered on Days 1 - 5

  • DrugKetamine

    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.

06

What researchers measure

Primary outcomes

  1. Test score on the Hopkins Verbal Learning Test - Immediate Recall

    Time frame: Day 5

Secondary outcomes

  1. Test score on the Weschler Digit Span Test

    Time frame: Day 5

  2. Test score on the CogState N-back test

    Time frame: Day 5

  3. Test score on the CogState Spatial Working memory test

    Time frame: Day 5

  4. Test score on the CogState One Card Learning test

    Time frame: Day 5

  5. Test score on the Hopkins Verbal Learning test - Delayed Recall

    Time frame: Day 5

  6. Retrospective rating on the Positive and Negative Syndrome Scale -modified scale'

    Time frame: Day 5

07

Study locations

2 sites
  • Pfizer Investigational Site
    New Haven, Connecticut 06511, United States
  • Pfizer Investigational Site
    West Haven, Connecticut 06516, United States
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 21, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01749098
Lead sponsor
Biogen
Responsible party
Sponsor
First posted
Dec 13, 2012
Start date
Dec 2012
Primary completion
Feb 2014
Completion
Feb 2014
Last update
Nov 21, 2019

Study contacts

Medical Director
study director · Biogen

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2019. You cannot join it, but the record below documents what was studied.

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