Effects of Paxil CR on Neural Circuits in Posttraumatic Stress Disorder (PTSD)
This study has been completed.
First Posted: May 6, 2008
Last Update Posted: March 1, 2017
Information provided by (Responsible Party):
J. Douglas Bremner, M.D., Emory University
Posttraumatic stress disorder (PTSD) is a major public health problem in this country. It is estimated that at least one out of every seven women in our society have been the victim of childhood sexual abuse at least once before their 18th birthday. Previous studies have shown that stress is associated with damage to neurons of the hippocampus, a brain area involved in learning and memory. Also, imaging studies of brain function are consistent with dysfunction of the medial prefrontal cortex during presentation of traumatic cues. We have previously shown that serotonin reuptake inhibitor medications (paroxetine; Paxil) can change memory function and hippocampal structure in PTSD. We now propose to perform a placebo controlled study with Paxil CR (paroxetine hydrochloride controlled-release tablets), which is thought as paroxetine with less side-effects. The main purpose of this study is to determine the effects of Paxil CR on memory deficits measured with neuropsychological testing, hippocampal volume measured with a magnetic resonance imaging (MRI), medial prefrontal lobe cortical function estimated with PET, and cortisol response (reflecting the intensity of stress) in men and women with PTSD. We plan to recruit 40 subjects. After completing physical examination and evaluating neuropsychiatric history, patients will undergo an initial group of tests which includes memory testing, MRI and PET brain scan, and measurement of cortisol in their saliva. Afterwards, half will receive Paxil CR 12.5 to 62.5 mg and half will receive a placebo (sugar pill) in the beginning of the first 12 weeks as "Double Blind Phase". After 12 weeks, they will be administered memory tests, PET and MRI scan for the post-treatment phase. After this period, Paxil CR will be offered to the placebo group and followed for an additional 12 weeks. They will have final memory tests, and a MRI scan. We hypothesize that Paxil CR exerts its efficacy by acting on abnormal neural circuits, including hippocampus and prefrontal cortex, in PTSD.
|Posttraumatic Stress Disorder (PTSD)||Drug: paroxetine Drug: placebo||Phase 4|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Basic Science
|Official Title:||Effects of Paxil CR on Neural Circuits in PTSD|
Resource links provided by NLM:
Drug Information available for: Paroxetine Paroxetine hydrochloride Paroxetine hydrochloride hemihydrate Paroxetine MesylateU.S. FDA Resources
Further study details as provided by J. Douglas Bremner, M.D., Emory University:
Primary Outcome Measures:
- Brain Function with Traumatic Reminders [ Time Frame: three months ]PET measurement of brain activation before and after paroxetine or placebo treatment.
|Study Start Date:||May 2003|
|Study Completion Date:||September 2007|
|Primary Completion Date:||September 2007 (Final data collection date for primary outcome measure)|
Placebo Comparator: 2
Contacts and Locations
No Contacts or Locations Provided