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CompletedNCT00690170Updated May 9, 2012

Nicotinic Modulation of Schizophrenia-like Information Processing Deficits in Healthy Subjects

A Phase 1 interventional study of Ketamine and Nicotine in Healthy Subjects, sponsored by Yale University. Completed at 1 site in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2012-05-09.

Sponsored by Yale University · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

This study examines the interactive effects of ketamine and nicotine.

02

Conditions studied

  • Healthy Subjects

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Keywords

  • ketamine
  • nicotine
  • schizophrenia
  • cognitive deficits
  • P300 oddball paradigm
  • Mismatch Negativity
  • P50 gating
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 30 is below the median of 70 across 2,872 interventional studies indexed under Schizophrenia.

Browse Schizophrenia studies →

Lead sponsor

Yale University is the lead sponsor of 1,724 studies on the registry; 298 are open to participants now.

Of its 210 completed or terminated interventional studies of FDA-regulated products, 126 (60%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Eligibility criteria

Inclusion Criteria:

  • 18-50 years old
  • Smokers
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
30 participants (actual)

Study arms

  • Active comparator
    Ketamine and Nicotine

    * 0.23 mg/kg of ketamine bolus IV (in the arm) over one minute followed by maintenance infusion at 0.58mg/kg/hour x 30 minutes, followed by 0.29 mg/kg/hour x 64 minutes. * 13.5 µg/kg of nicotine IV (in the arm) given over 10 min (1.35 µg/min/kg), followed by a constant infusion of 31.02 µg/kg given over 85 min (0.365 µg/min/kg)

    Drug: Ketamine and Nicotine

  • Placebo comparator
    Placebo Comparator

    -Placebo administration: Normal saline (sodium chloride 0.9%)over 95 minutes

    Drug: Placebo

  • Active comparator
    Ketamine and Placebo

    Ketamine administration: 0.23 mg/kg bolus over one minute followed by maintenance infusion at 0.58mg/kg/hour x 30 minutes, followed by 0.29 mg/kg/hour x 64 minutes Placebo administration: Normal saline (sodium chloride 0.9%)over 94 minutes

    Drug: Ketamine

  • Active comparator
    Nicotine and Placebo

    Nicotine: 13.5 µg/kg given over 10 min (1.35 µg/min/kg)IV (in the arm), followed by a constant infusion of 31.02 µg/kg given over 85 min (0.365 µg/min/kg) Placebo: Normal saline (sodium chloride 0.9%)IV (in the arm)

    Drug: Nicotine

Interventions

  • DrugKetamine

    Ketamine: 0.23 mg/kg bolus over one minute followed by maintenance infusion at 0.58mg/kg/hour x 30 minutes, followed by 0.29 mg/kg/hour x 64 minutes

    Also known as: K, Special K

  • DrugNicotine

    Nicotine: 13.5 µg/kg given over 10 min (1.35 µg/min/kg),IV (in the arm) followed by a constant infusion of 31.02 µg/kg given over 85 min (0.365 µg/min/kg) Placebo: Normal saline (sodium chloride 0.9%)IV (in the arm)

  • DrugPlacebo

    Normal saline (sodium chloride 0.9%)administered via IV (in the arm) over 95 minutes

  • DrugKetamine and Nicotine

    0.23 mg/kg of ketamine bolus IV (in the arm) over one minute followed by maintenance infusion at 0.58mg/kg/hour x 30 minutes, followed by 0.29 mg/kg/hour x 64 minutes. 13.5 µg/kg of nicotineIV (in the arm) given over 10 min (1.35 µg/min/kg), followed by a constant infusion of 31.02 µg/kg given over 85 min (0.365 µg/min/kg)

06

What researchers measure

Primary outcomes

  1. ERP recording procedures: Brain wave activity during tasks involving in processing auditory and visual stimuli with different degrees of attentional and memory demands will be recorded.

    Time frame: +65

  2. IntegNeuro is a computerized battery that consists of an automated stimulus presentation to measure cognitive function.

    Time frame: +25

  3. Positive and Negative Syndrome Scale will be used to measure psychotic symptoms.

    Time frame: -90, +10, +105, +180

07

Study locations

1 site
  • Veterans Administration Hospital
    West Haven, Connecticut 06516, United States
08

References and documents

Publications

  • D'Souza DC, Ahn K, Bhakta S, Elander J, Singh N, Nadim H, Jatlow P, Suckow RF, Pittman B, Ranganathan M. Nicotine fails to attenuate ketamine-induced cognitive deficits and negative and positive symptoms in humans: implications for schizophrenia. Biol Psychiatry. 2012 Nov 1;72(9):785-94. doi: 10.1016/j.biopsych.2012.05.009. Epub 2012 Jun 19. PubMed 22717030 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 9, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00690170
Lead sponsor
Yale University
Responsible party
Deepak C. D'Souza (Associate Professor, Yale University) — Principal investigator
First posted
Jun 4, 2008
Start date
Dec 2002
Primary completion
Jun 2009
Completion
Sep 2009
Last update
May 9, 2012

Study contacts

Deepak C D'Souza, M.D.
principal investigator · Yale University School of Medicine Department of Psychiatry

Oversight

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

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This study is completed, as verified in May 2012. You cannot join it, but the record below documents what was studied.

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