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A Placebo-Controlled Study of Mirtazapine for PTSD

This study has been completed.
Information provided by (Responsible Party):
VA Office of Research and Development Identifier:
First received: March 9, 2006
Last updated: November 25, 2014
Last verified: November 2014
Results First Received: January 3, 2014  
Study Type: Interventional
Study Design: Allocation: Randomized;   Intervention Model: Parallel Assignment;   Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor);   Primary Purpose: Treatment
Conditions: Anxiety
Interventions: Drug: Mirtazapine
Drug: Placebo

  Participant Flow
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Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
Participants were recruited from the Tuscaloosa and Birmingham VA Medical Centers between April 2006 and November 2010.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
Prior to randomization, participants signed informed consent, were assessed to have met eligibility criteria including free of psychotropic medications for the previous two weeks (4 weeks for fluoxetine) prior to randomization.

Reporting Groups
Mirtazapine Mirtazapine up to 45mg/qhs (three 15mg pills) as tolerated.
Placebo Placebo up to three pills qhs

Participant Flow:   Overall Study
    Mirtazapine   Placebo
STARTED   39   39 
COMPLETED   31   30 
Lost to Follow-up                6                5 
Protocol Violation                1                0 
Relocation                0                1 
Withdrawal by Subject                0                3 
Adverse Event                1                0 

  Baseline Characteristics
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Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
Seventy-three (94%) were male; mean age 38.1 +/- 9.5 (SD) years in placebo group and 37.7 +/- 10.3 (SD) in mirtazapine group.

Reporting Groups
Mirtazapine Mirtazapine up to 45 mg/qhs as tolerated
Placebo Placebo up to three tablets qhs
Total Total of all reporting groups

Baseline Measures
   Mirtazapine   Placebo   Total 
Overall Participants Analyzed 
[Units: Participants]
 39   39   78 
[Units: Years]
Mean (Standard Deviation)
 37.7  (10.3)   38.1  (9.5)   37.9  (9.9) 
[Units: Participants]
Female   2   3   5 
Male   37   36   73 
Region of Enrollment 
[Units: Participants]
United States   39   39   78 

  Outcome Measures

1.  Primary:   Structured Interview of Posttraumatic Stress Disorder (SIP)   [ Time Frame: Primary outcome is measured at baseline and week 8 (primary endpoint) with primary outcome change scores calculated as week 8 minus baseline score. ]

  Serious Adverse Events

  Other Adverse Events

  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
Small sample of predominantly male combat veterans limits generalizability of findings.

  More Information
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Certain Agreements:  
All Principal Investigators ARE employed by the organization sponsoring the study.

Results Point of Contact:  
Name/Title: Lori Davis, MD
Organization: Tuscaloosa VA Medical Center
phone: 205-554-2000

Responsible Party: VA Office of Research and Development Identifier: NCT00302107     History of Changes
Obsolete Identifiers: NCT00449189
Other Study ID Numbers: MHBA-019-05F
Study First Received: March 9, 2006
Results First Received: January 3, 2014
Last Updated: November 25, 2014