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CAP-Ketamine for Antidepressant Resistant PTSD

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: NCT02655692
Recruitment Status : Completed
First Posted : January 14, 2016
Results First Posted : June 2, 2022
Last Update Posted : June 2, 2022
Sponsor:
Collaborators:
The University of Texas Health Science Center at San Antonio
Brooke Army Medical Center
Minneapolis Veterans Affairs Medical Center
Information provided by (Responsible Party):
VA Office of Research and Development

Study Type Interventional
Study Design Allocation: Randomized;   Intervention Model: Parallel Assignment;   Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor);   Primary Purpose: Treatment
Conditions PTSD
Posttraumatic Stress Disorder
Interventions Drug: Ketamine
Drug: Placebo/Saline
Enrollment 163
Recruitment Details  
Pre-assignment Details  
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Period Title: Overall Study
Started 55 55 53
Completed 36 41 40
Not Completed 19 14 13
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine Total
Hide Arm/Group Description

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Total of all reporting groups
Overall Number of Baseline Participants 54 53 51 158
Hide Baseline Analysis Population Description
All available data was utilized in the analysis using raw means and SDs
Age, Continuous  
Mean (Standard Deviation)
Unit of measure:  Years
Number Analyzed 54 participants 53 participants 51 participants 158 participants
42  (1.5) 45  (1.5) 43  (1.8) 43.3  (11.5)
Sex: Female, Male  
Measure Type: Count of Participants
Unit of measure:  Participants
Number Analyzed 54 participants 53 participants 51 participants 158 participants
Female
14
  25.9%
10
  18.9%
13
  25.5%
37
  23.4%
Male
40
  74.1%
43
  81.1%
38
  74.5%
121
  76.6%
Race/Ethnicity, Customized  
Measure Type: Count of Participants
Unit of measure:  Participants
Number Analyzed 54 participants 53 participants 51 participants 158 participants
White - non Hispanic
37
  68.5%
28
  52.8%
29
  56.9%
94
  59.5%
Black
6
  11.1%
7
  13.2%
7
  13.7%
20
  12.7%
Hispanic
8
  14.8%
11
  20.8%
12
  23.5%
31
  19.6%
Other
3
   5.6%
7
  13.2%
3
   5.9%
13
   8.2%
PCL   [1] 
Mean (Standard Deviation)
Unit of measure:  Units on a scale
Number Analyzed 54 participants 53 participants 51 participants 158 participants
51.95  (10.82) 51.75  (12.38) 50.23  (14.69) 51.33  (12.62)
[1]
Measure Description: The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure. A total symptom severity score (range - 0-80) with higher scores indicating greater severity.
1.Primary Outcome
Title PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 1 -Day 0
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 54 53 51
Mean (Standard Deviation)
Unit of Measure: units on a scale
48.56  (12.76) 46.62  (17.71) 47.88  (14.46)
2.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 2 - Day 1
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 52 51 49
Mean (Standard Deviation)
Unit of Measure: units on a scale
37.65  (18.40) 32.75  (19.39) 30.10  (20.25)
3.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 3 - Day 3
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 51 50 44
Mean (Standard Deviation)
Unit of Measure: units on a scale
36.90  (18.11) 33.66  (18.67) 34.20  (18.37)
4.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 4 - Day 7
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 48 47 43
Mean (Standard Deviation)
Unit of Measure: units on a scale
34.75  (18.96) 29.09  (20.61) 32.58  (19.12)
5.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 5 - Day 10
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 47 45 46
Mean (Standard Deviation)
Unit of Measure: units on a scale
35.11  (18.84) 28.51  (21.12) 31.46  (18.60)
6.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 6 - Day 14
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 48 43
Mean (Standard Deviation)
Unit of Measure: units on a scale
30.80  (19.85) 26.40  (21.12) 27.91  (17.04)
7.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 7 - Day 17
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 47 41
Mean (Standard Deviation)
Unit of Measure: units on a scale
28.48  (19.47) 24.13  (20.15) 26.54  (17.58)
8.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 8 - Day 21
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 42 42 40
Mean (Standard Deviation)
Unit of Measure: units on a scale
29.31  (20.39) 24.52  (20.45) 26.73  (17.20)
9.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Session 9 - Day 24
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 45 46 42
Mean (Standard Deviation)
Unit of Measure: units on a scale
28.31  (19.89) 21.94  (20.35) 25.62  (19.86)
10.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 1 - Day 25
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 43 41
Mean (Standard Deviation)
Unit of Measure: units on a scale
27.34  (20.25) 21.35  (20.70) 22.54  (17.98)
11.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 2 - Day 28
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 25 17 12
Mean (Standard Deviation)
Unit of Measure: units on a scale
37.84  (18.37) 34.59  (18.45) 39.58  (15.55)
12.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 3 - Day 29
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 24 18 11
Mean (Standard Deviation)
Unit of Measure: units on a scale
33.79  (19.80) 33.72  (20.17) 40.27  (16.29)
13.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 4 - Day 35
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 38 38 33
Mean (Standard Deviation)
Unit of Measure: units on a scale
26.92  (19.17) 22.84  (21.46) 24.09  (17.05)
14.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 5 - Day 42
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 35 39 37
Mean (Standard Deviation)
Unit of Measure: units on a scale
28.14  (20.92) 25.62  (21.81) 29.16  (19.85)
15.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 6 - Day 49
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 35 39 38
Mean (Standard Deviation)
Unit of Measure: units on a scale
30.71  (21.33) 24.90  (20.66) 30.21  (18.82)
16.Primary Outcome
Title The PTSD Checklist (PCL)
Hide Description The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD
Time Frame Follow-up 7 - Day 56
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 39 41 35
Mean (Standard Deviation)
Unit of Measure: units on a scale
31.90  (21.08) 24.32  (21.15) 31.23  (19.81)
17.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 1 - Day 0
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 54 52 51
Mean (Standard Deviation)
Unit of Measure: score on a scale
28.24  (8.43) 27.81  (10.30) 27.84  (9.30)
18.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 2 - Day 1
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 52 51 48
Mean (Standard Deviation)
Unit of Measure: score on a scale
17.75  (11.16) 17.02  (13.02) 12.94  (9.50)
19.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 3 - Day 3
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 51 50 44
Mean (Standard Deviation)
Unit of Measure: score on a scale
19.98  (11.22) 19.34  (12.77) 17.86  (11.55)
20.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 4 - Day 7
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 47 46 43
Mean (Standard Deviation)
Unit of Measure: score on a scale
19.94  (11.64) 17.83  (13.11) 18.54  (10.62)
21.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 5 - Day 10
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 47 45 46
Mean (Standard Deviation)
Unit of Measure: score on a scale
20.70  (11.79) 16.64  (12.90) 18.07  (9.98)
22.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 6 - Day 14
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 48 42
Mean (Standard Deviation)
Unit of Measure: score on a scale
18.36  (11.90) 16.71  (13.47) 16.83  (9.91)
23.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 7 - Day 17
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 47 41
Mean (Standard Deviation)
Unit of Measure: score on a scale
17.02  (12.52) 14.75  (12.98) 15.15  (10.35)
24.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 8 - Day 21
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 42 42 40
Mean (Standard Deviation)
Unit of Measure: score on a scale
17.02  (12.52) 16.44  (13.66) 15.78  (11.59)
25.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Session 9 - Day 24
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 45 45 42
Mean (Standard Deviation)
Unit of Measure: score on a scale
17.11  (11.75) 14.43  (12.29) 14.24  (10.59)
26.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 1 - Day 25
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 44 42 41
Mean (Standard Deviation)
Unit of Measure: score on a scale
15.98  (12.32) 12.91  (12.60) 10.78  (9.85)
27.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 2 - Day 28
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 25 18 12
Mean (Standard Deviation)
Unit of Measure: score on a scale
24.00  (10.30) 25.11  (12.20) 25.08  (7.34)
28.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 3 - Day 29
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 24 17 11
Mean (Standard Deviation)
Unit of Measure: score on a scale
15.00  (11.55) 19.18  (13.99) 20.27  (8.32)
29.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 4 - Day 35
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 37 37 33
Mean (Standard Deviation)
Unit of Measure: score on a scale
16.08  (11.15) 14.43  (12.71) 12.72  (9.24)
30.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 5 - Day 42
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 35 39 36
Mean (Standard Deviation)
Unit of Measure: score on a scale
16.89  (12.51) 15.74  (13.03) 16.42  (9.39)
31.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 6 - Day 49
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 35 38 37
Mean (Standard Deviation)
Unit of Measure: score on a scale
19.60  (11.52) 15.87  (11.79) 17.68  (8.86)
32.Secondary Outcome
Title Montgomery-Asberg Depression Rating Scale (MADRS)
Hide Description Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; >34 - severe depression)
Time Frame Follow-up 7 - Day 56
Hide Outcome Measure Data
Hide Analysis Population Description
The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description:

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

Overall Number of Participants Analyzed 40 41 33
Mean (Standard Deviation)
Unit of Measure: score on a scale
19.45  (11.19) 15.44  (12.98) 19.58  (10.94)
Time Frame The study duration was 5 years; time Veterans participated was ~2 months total.
Adverse Event Reporting Description [Not Specified]
 
Arm/Group Title Placebo Low Dose Ketamine High Dose Ketamine
Hide Arm/Group Description

Saline dose

Placebo: This is a saline placebo/non-active solution.

Low Dose Ketamine (.20 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

High Dose Ketamine (.50 mg/kg)

Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.

All-Cause Mortality
Placebo Low Dose Ketamine High Dose Ketamine
Affected / at Risk (%) Affected / at Risk (%) Affected / at Risk (%)
Total   0/55 (0.00%)   0/55 (0.00%)   0/53 (0.00%) 
Hide Serious Adverse Events
Placebo Low Dose Ketamine High Dose Ketamine
Affected / at Risk (%) Affected / at Risk (%) Affected / at Risk (%)
Total   0/55 (0.00%)   0/55 (0.00%)   0/53 (0.00%) 
Hide Other (Not Including Serious) Adverse Events
Frequency Threshold for Reporting Other Adverse Events 0%
Placebo Low Dose Ketamine High Dose Ketamine
Affected / at Risk (%) Affected / at Risk (%) Affected / at Risk (%)
Total   25/55 (45.45%)   42/55 (76.36%)   38/53 (71.70%) 
Gastrointestinal disorders       
diarrhea   2/55 (3.64%)  3/55 (5.45%)  2/53 (3.77%) 
nausea/GI disturb   8/55 (14.55%)  8/55 (14.55%)  8/53 (15.09%) 
constipation   0/55 (0.00%)  0/55 (0.00%)  3/53 (5.66%) 
General disorders       
fatigue   2/55 (3.64%)  3/55 (5.45%)  4/53 (7.55%) 
headache   7/55 (12.73%)  14/55 (25.45%)  6/53 (11.32%) 
nightmares   2/55 (3.64%)  1/55 (1.82%)  2/53 (3.77%) 
soreness/bruising at INJ site   2/55 (3.64%)  0/55 (0.00%)  1/53 (1.89%) 
sweating   0/55 (0.00%)  1/55 (1.82%)  2/53 (3.77%) 
Psychiatric disorders       
anxiety   0/55 (0.00%)  2/55 (3.64%)  2/53 (3.77%) 
depression   1/55 (1.82%)  1/55 (1.82%)  1/53 (1.89%) 
suicidality   1/55 (1.82%)  1/55 (1.82%)  1/53 (1.89%) 
Social circumstances       
agitation   0/55 (0.00%)  3/55 (5.45%)  3/53 (5.66%) 
irritability   0/55 (0.00%)  5/55 (9.09%)  3/53 (5.66%) 
Indicates events were collected by systematic assessment
Certain Agreements
Principal Investigators are NOT employed by the organization sponsoring the study.
There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.
Results Point of Contact
Layout table for Results Point of Contact information
Name/Title: John Krystal
Organization: Yale University
Phone: 203.785.6396
EMail: john.krystal@yale.edu
Layout table for additonal information
Responsible Party: VA Office of Research and Development
ClinicalTrials.gov Identifier: NCT02655692    
Other Study ID Numbers: SPLE-003-14W
First Submitted: January 7, 2016
First Posted: January 14, 2016
Results First Submitted: October 25, 2021
Results First Posted: June 2, 2022
Last Update Posted: June 2, 2022