Veteran Stress and Learning Study

Effects of Hydrocortisone and D-Cycloserine on Fear Extinction in Veterans With Posttraumatic Stress Disorder

This is a research study examining the use of two medications, Hydrocortisone and D-Cycloserine, compared to an inactive substance (placebo), on their ability to reduce fear responses and memory of fear in Veterans with symptoms of Posttraumatic Stress Disorder (PTSD). These responses will be tested using a fear learning and memory task administered by computer.

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