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NCT00352586 · ClinicalTrials.gov registry record
Effect of D-cycloserine on Extinction of Fear Conditioning
A clinical trial, sponsored by National Institute of Mental Health (NIMH).
- Completed
- Registry status
- 160
- Enrollment target
NCT00352586 is a clinical trial that has completed, run by National Institute of Mental Health (NIMH). The registered enrollment target is 160 participants.
The verdict
NCT00352586 has completed, sponsored by National Institute of Mental Health (NIMH).
- COMPLETED
- Registry status
- 160 participants
- Enrollment target
Study Summary
This study will evaluate whether the drug D-cycloserine (DCS) can improve a type of learning called classical conditioning, in which the brain learns to associate neutral stimuli with stimuli that elicit emotional or physiological responses. DCS is an antibiotic that was initially approved to treat tuberculosis and has been tested in clinical trials over the last decade for enhancing cognitive function. This protocol includes both a pilot study and a main study. The main study will begin after the pilot study ends. Healthy normal volunteers between 18 and 45 years of age may be eligible for these studies. Candidates will be screened with a medical and psychiatric history and a physical examination that includes blood and urine samples, an electrocardiogram (EKG), hearing test and startle test. The startle test involves recording eyeblink responses to loud noises. After the screening visit, those enrolled will participate in the pilot or main study, in which their reactions to two types of stimuli-an unpleasant, but harmless, shock to the arm and a mild puff of air to the eye-will be measured and recorded. \- Pilot Study Session 1 - Participants will receive very brief electric shocks delivered through two electrodes attached to the forearm or fingers and will hear brief loud sounds that may startle. Geometric shapes will be presented on a computer monitor. Sessions 2 and 3 - The procedure is the same as in session 1, except participants will also be subjected to brief low-intensity tones and airpuffs to the eye. \- Main Study Participants will undergo the same procedures described in the pilot study, with the following additions: * They will have an intravenous tube placed in a vein for collecting blood during the test. * They will take a pill each test day that contains either 100 mg DCS, 500 mg DCS, or a placebo (inactive substance). Subjects assigned to receive DCS will get the active drug on only one of the three test sessions and will be given placebo t
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 160 participants |
| Start Date | 2002-04-03 |
| Est. Completion | 2008-02-01 |
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Full Details on ClinicalTrials.gov ↗What the Registry Record Tells You About NCT00352586
The ClinicalTrials.gov registry entry for NCT00352586 describes a study currently listed as completed, categorized as an unspecified phase. The registered enrollment target is 160 participants, a figure that helps gauge the scale of data the investigators plan to collect. The listed sponsor is National Institute of Mental Health (NIMH), which has 343 total studies on file at ClinicalTrials.gov.
The record links to 0 conditions, and to 0 interventions.
NCT00352586 reports 0 study locations.
Frequently Asked Questions
What is clinical trial NCT00352586 about?
NCT00352586 is a clinical study titled "Effect of D-cycloserine on Extinction of Fear Conditioning". This study will evaluate whether the drug D-cycloserine (DCS) can improve a type of learning called classical conditioning, in which the brain learns to associate neutral stimuli with stimuli that elicit emotional or physiological responses. DCS is an antibiotic that was initially approved to treat ...
What is the current status of trial NCT00352586?
This trial is currently completed. The enrollment target is 160 participants. The study started on 2002-04-03. Estimated completion is 2008-02-01.
Who is sponsoring clinical trial NCT00352586?
This trial is sponsored by National Institute of Mental Health (NIMH), which has 343 total clinical trials registered on ClinicalTrials.gov.
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