Veteran Stress and Learning Study (VSL)
![]() |
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. |
ClinicalTrials.gov Identifier: NCT00674570 |
Recruitment Status :
Completed
First Posted : May 8, 2008
Last Update Posted : January 23, 2019
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Stress Disorders, Posttraumatic | Drug: Hydrocortisone Drug: D-Cycloserine Drug: Placebo | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 138 participants |
Allocation: | Randomized |
Intervention Model: | Factorial Assignment |
Masking: | Triple (Participant, Investigator, Outcomes Assessor) |
Primary Purpose: | Basic Science |
Official Title: | Effects of Hydrocortisone and D-Cycloserine on Fear Extinction in Veterans With Posttraumatic Stress Disorder |
Actual Study Start Date : | July 1, 2008 |
Actual Primary Completion Date : | June 1, 2017 |
Actual Study Completion Date : | June 1, 2017 |

Arm | Intervention/treatment |
---|---|
Experimental: Arm 1: Hydrocortisone
Hydrocortisone
|
Drug: Hydrocortisone
25 mg/oral one hour prior to extinction task |
Experimental: Arm 2: D-Cycloserine
D-Cycloserine
|
Drug: D-Cycloserine
50 mg/oral one hour prior to extinction task |
Placebo Comparator: Arm 3: Placebo
Placebo
|
Drug: Placebo
One hour prior to extinction task |
- Skin Conductance Change [ Time Frame: Day 7, 9, 16 ]A Coulbourn Modular Instrument System was used. Skin conductance was measured directly by a Coulbourn Isolated Skin Conductance coupler (S71-23) using a constant .5 V through 9 mm (sensor diameter) Sensor Medics Ag/AgCl electrodes placed on the hypothenar surface of the participant's non-dominant hand. The SC electrodes were separated by 14 mm. The SC level analog signal was digitized by a Coulbourn Lablinc Analog to Digital Converter (L25-12). A Microsoft Windows-based computer system was used for sampling and storing the digitized SC signal and controlling stimulus presentations.
- Heart Rate Change [ Time Frame: Day 7, 9, 16 ]HR was recorded by standard limb electrocardiogram leads connected to a High Gain Bioamplifier (S75-01) inputting to a Coulbourn Tachometer (S77-26). Physiologic analog signals were digitized by a Coulbourn Lablinc Analog to Digital Converter (L25-12).
- Corrugator EMG Change [ Time Frame: Day 7, 9, 16 ]EMG in microvolts was. Three 4-mm (sensor diameter) Ag/AgCl electrodes were placed on the corrugator muscle/forehead. Impedance levels were kept below 10 k . The EMG signal was amplified, rectified, and filtered so as to retain the 10- to 500-Hz range, notch filtered at 60 Hz, sampled at 500-Hz, digitized for 4 s beginning with the stimulus onset and stored for analysis.

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: | 18 Years to 65 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Veterans and civilians with an age range of 18 to 65 years
- Participants must be physically healthy volunteers
Exclusion Criteria:
- Individuals who fall outside the age range
- Individuals with medical conditions that would interfere with participation
- Other criteria

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): NCT00674570
United States, California | |
San Francisco VA Medical Center, San Francisco, CA | |
San Francisco, California, United States, 94121 |
Principal Investigator: | Sabra S Inslicht, PhD | San Francisco VA Medical Center, San Francisco, CA |
Publications:
Responsible Party: | VA Office of Research and Development |
ClinicalTrials.gov Identifier: | NCT00674570 History of Changes |
Other Study ID Numbers: |
CDA-2-037-07F H841-31915-01A ( Other Identifier: San Francisco VAMC ) |
First Posted: | May 8, 2008 Key Record Dates |
Last Update Posted: | January 23, 2019 |
Last Verified: | January 2019 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes | |
Studies a U.S. FDA-regulated Device Product: | No | |
Product Manufactured in and Exported from the U.S.: | Yes |
Keywords provided by VA Office of Research and Development:
Stress Disorders, Posttraumatic Hydrocortisone Cycloserine |
Extinction, Psychological PTSD San Francisco |
Additional relevant MeSH terms:
Cycloserine Stress Disorders, Traumatic Stress Disorders, Post-Traumatic Trauma and Stressor Related Disorders Mental Disorders Hydrocortisone 17-butyrate 21-propionate Hydrocortisone acetate Cortisol succinate Hydrocortisone |
Anti-Inflammatory Agents Anti-Infective Agents, Urinary Anti-Infective Agents Renal Agents Antibiotics, Antitubercular Antitubercular Agents Anti-Bacterial Agents Antimetabolites Molecular Mechanisms of Pharmacological Action |