CClinicalTrials.gg
CompletedNCT01882829Updated Jun 11, 2018Results posted

Nuedexta in Treatment-Resistant Major Depression

A Phase 2 interventional study of dextromethorphan/quinidine in Major Depressive Disorder and Treatment Resistant, sponsored by James Murrough. Completed at 1 site in United States. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2018-06-11.

Sponsored by James Murrough · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
20
Allocation
Not applicable
Ages
18 Years to 65 Years
Sex
All
01

Study summary

There is an urgent need, therefore, to identify well-tolerated, orally available compounds that target the NMDA receptor as a novel treatment approach for TRD. The current project aims to test the safety, tolerability and efficacy of Nuedexta - containing the NMDA antagonist dextromethorphan.

Read the detailed description

Approximately one-third of patients with major depressive disorder do not achieve adequate symptom control despite a series of multiple treatment trials with currently available antidepressant medication (for example a serotonin-selective reuptake inhibitor). This group of patients - representing treatment-resistant depression (TRD) - accounts for an alarmingly high public health burden and signifies a critical area of need in pharmaceutical treatment development. While current treatments are slow to act and only partially effective, new basic and clinical research focusing on the glutamate system is yielding promising new avenues for novel drug discovery. Ketamine - a glutamate N-methyl-d-aspartate (NMDA) receptor antagonist - has now been demonstrated in several studies to bring about a rapid and robust antidepressant effect, even in patients suffering from TRD. Ketamine is limited as a treatment for TRD by the need for intravenous administration and the potential for untoward medical or psychiatric adverse effects. There is an urgent need, therefore, to identify well-tolerated, orally available compounds that target the NMDA receptor as a novel treatment approach for TRD. The current project aims to test the safety, tolerability and efficacy of Nuedexta - containing the NMDA antagonist dextromethorphan.

02

Conditions studied

  • Major Depressive Disorder
  • Treatment Resistant

Keywords

  • depression
  • major depressive disorder
  • treatment resistant
  • Nuedexta
  • dextromethorphan
  • antidepressant
  • glutamate
  • NMDA receptor
03

In context

Depression

8,057 studies on the registry are indexed under Depression; 1,641 are open to participants now.

This study's enrollment of 20 is below the median of 84 across 6,720 interventional studies indexed under Depression.

Browse Depression studies →

Lead sponsor

James Murrough is the lead sponsor of 9 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male or female participants, 18-65 years of age;
  • Current primary Axis I diagnosis of major depressive disorder according to DSM-IV-TR criteria as determined by a psychiatrist and confirmed with the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID);
  • Current treatment-resistant depression defined by a history of inadequate response to a minimum of 2 adequate antidepressant treatment trials determined by patient history and chart review and confirmed with the Antidepressant Treatment History Form (ATHF);
  • Participants must be willing to discontinue treatment with concomitant medications that are disallowed by the study protocol;
  • Participants must have a level of understanding of the English language sufficient to agree to all tests and examinations required by the study and must be able to participate fully in the informed consent process.

Exclusion criteria

Exclusion Criteria:

  • Lifetime diagnosis of schizophrenia or any psychotic disorder, bipolar disorder, pervasive developmental disorders or mental retardation
  • Diagnosis of a substance use disorder within the past 1 year ;
  • Female participants who are pregnant, nursing, for may become pregnant;
  • Any unstable medical illnesses including hepatic, renal, gastroenterologic, respiratory, cardiovascular (including ischemic heart disease); endocrinologic, neurologic (including history of severe head injury), immunologic, or hematologic disease;
  • Participants with clinically significant abnormalities of laboratories, physical examination, or ECG;
  • Prolonged QT interval, congenital long QT syndrome, history suggestive of torsades de pointes, or heart failure;
  • Complete atrioventricular (AV) block without implanted pacemaker, or patients at high risk of complete AV block
  • Participants with a history of quinidine, quinine or mefloquine-induced thrombocytopenia, hepatitis, or other hypersensitivity reactions;
  • Participants judged to be at serious suicidal risk by the PI;
  • Concomitant use with quinidine, quinine, or mefloquine;
  • Participants with known hypersensitivity to dextromethorphan;
  • Use with an MAOI or within 14 days of stopping an MAOI;
  • Concomitant use with drugs that prolong QT interval and are metabolized by CYP2D6
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Nuedexta (dextromethorphan/quinidine)

    45/10 mg every 12 hours x 8 weeks

    Drug: dextromethorphan/quinidine

Interventions

  • Drugdextromethorphan/quinidine

    up to 45/10 mg every 12 hours in patients with TRD with a short 7 day tapering period in which subjects are tapered off 45/10 mg dose from twice a day to once daily for an additional 7 days at post 8-week treatment period to minimize the potential for discontinuation effects

    Also known as: Nuedexta

06

What researchers measure

Primary outcomes

  1. Montgomery-Asberg Depression Rating Scale

    The Montgomery-Asberg Depression Rating Scale is a 10-item instrument used for the evaluation of depressive symptoms in adults and for the assessment of any changes to those symptoms. Each of the 10 items is s scored 0 (normal) to 6 (severe depression) with overall score ranges from 0 (normal) to 60 (severe depression). Primary outcome is change in MADRS at Visit 6 (Week 10). Higher values represent a worse outcome.

    Time frame: At baseline and visit 6 (week 10)

Secondary outcomes

  1. Quality of Life Enjoyment and Satisfaction Questionnaire Short Form

    The Quality of Life Enjoyment and Satisfaction Questionnaire Short Form is a reliable and valid self-report measure designed to obtain sensitive measures of the degree of enjoyment and satisfaction experienced by individuals. The raw total score ranges from 14 to 70. Higher scores reflect better oucomes.

    Time frame: At baseline and Visit 6 (week 10)

  2. Range of Impaired Functioning Tool

    The Range of Impaired Functioning Tool a brief scale for assessing functional impairment related to medical or psychiatric illness and has been demonstrated to possess good psychometric properties. The LIFE-RIFT has a total score and individual domain scores for the following areas of functioning: household duties, work, recreation, relationships with family, relationships with friends, schoolwork, and global life satisfaction (the satisfaction item is patient rated). Higher scores indicate poorer functioning; scores ≥2 reflect impaired functioning in that domain. Results are reported for the total sum with full range from 3 (no impairment) to 60 (severe impairment), which is based on all individual domain scores.

    Time frame: At baseline and Visit 6 (week 10)

  3. Sheehan Disability Scale

    The Sheehan Disability Scale (SDS) is a self-rated scale which assesses illness-related disability in three areas of functioning: work, social and family. The SDS assess disability or functional impairment across three domains: work/school, social life/leisure activities and family life/home responsibilities. Each domain is scored from 0 (not at all) to 10 (very severely). The three domains can be summarized to evaluate global functional impairment by adding the scores of each of the three domains, resulting in global SDS score ranges from 0 (unimpaired) to 30 (highly impaired).

    Time frame: At baseline and Visit 6 (week 10)

  4. Patient Rated Inventory of Side Effects (PRISE)

    Frequency of observed adverse events over the study treatment period as captured by the PRISE. The Patient Rated Inventory of Side Effects (PRISE) assesses the presence of treatment side effects in nine organ/function systems (gastrointestinal, nervous system, heart, eyes/ears, skin, genital/urinary, sleep, sexual functioning, and other).

    Time frame: up to 12 weeks

  5. Columbia-Suicide Severity Rating Scale (C-SSRS)

    The Columbia-Suicide Severity Rating Scale (C-SSRS) is a comprehensive, semi-structured interview measure that uniquely measures the full spectrum of suicidality including passive and active suicidal ideation, suicidal intent as well as suicidal behaviors. Full range from 0 (low intensity suicidal ideation to 9 (high intensity suicidal ideation).

    Time frame: up to 12 weeks

  6. Quick Inventory of Depressive Symptomatology, Self Report (QIDS-SR)

    The Quick Inventory of Depressive Symptomatology, Self Report (QIDS-SR) is a 16-item self rated instrument designed to assess the severity of depressive symptoms (30). The 16 items cover the nine symptom domains of major depression, and are rated on a scale of 0-3. Total score ranges from 0 to 27, with ranges of 0-5 (normal), 6-10 (mild), 11-15 (moderate), 16-20 (moderate to severe), and 21+ (severe).

    Time frame: up to 12 weeks

  7. Clinical Global Impression (CGI) Scale

    The Clinical Global Impression (CGI) scale assesses overall treatment response in psychiatric patients and has good reliability and validity metrics. The administration time is 2 minutes. This scale consists of three items: Severity of Illness (item 1); Global Improvement (item 2); and Efficacy Index (item 3). Item 1 is rated on a seven-point scale (1 = normal, 7 = among the most extremely ill patients) as is item 2 (1 = very much improved, 7 = very much worse). Full scale is 1 to 14.

    Time frame: up to 12 weeks

  8. Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ)

    The Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ) is a brief scale to measure cognitive and executive dysfunction in mood and anxiety disorders, and possesses good reliability and validity. The Massachusetts General Hospital CPFQ was developed to assess each of the 7 most common complaints of depressed patients reporting fatigue or cognitive/executive problems. The CPFQ consists of 7 questions, each rated on a scale from 1 to 6, with 1 indicating greater than normal functioning, 2 indicating normal functioning and with higher numbers indicating poorer functioning. Total score range from 7 (greater than normal function) to 42 (poor function).

    Time frame: At baseline and Visit 6 (week 10)

  9. HAM-A

    Change in Hamilton Anxiety Rating Scale (HAM-A) score from baseline to Week 10. It consists of 14 items, each defined by a series of symptoms. Each item is rated on a 5-point scale, ranging from 0 (not present) to 4 (severe), with a total score range of 0-56, where \<17 indicates mild severity, 18-24 mild to moderate severity and \>25-30 moderate to severe.

    Time frame: Baseline and Week 10

  10. Beck Scale for Suicidal Ideation (BSI)

    Mean change in Brief Inventory Symptom from baseline to week 10. The BSS is a self-report 19-item scale preceded by five screening items. The BSS and its screening items are intended to assess a patient's thoughts, plans and intent to commit suicide. All 24 items are rated on a three-point scale (0 to 2). In this study, scores from the five screening items were included in the overall score. Therefore, total scores could range from 0 to 48, with higher scores reflecting more severe symptoms.

    Time frame: Baseline and Week 10

07

Results

Posted Jun 11, 2018

Participant flow

Recruitment period from October 2013 to December 2015

Participant flow — Overall Study
MilestoneNuedexta (Dextromethorphan/Quinidine)
Started20
Completed14
Not completed6
Withdrew: Adverse event4
Withdrew: Protocol violation1
Withdrew: Withdrawal by subject1

Outcome measures

PrimaryMontgomery-Asberg Depression Rating Scale

The Montgomery-Asberg Depression Rating Scale is a 10-item instrument used for the evaluation of depressive symptoms in adults and for the assessment of any changes to those symptoms. Each of the 10 items is s scored 0 (normal) to 6 (severe depression) with overall score ranges from 0 (normal) to 60 (severe depression). Primary outcome is change in MADRS at Visit 6 (Week 10). Higher values represent a worse outcome.

Time frame:
At baseline and visit 6 (week 10)
Reported as:
Mean · change in units on a scale
Montgomery-Asberg Depression Rating Scale
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Montgomery-Asberg Depression Rating Scale-13.0 ± 11.5
SecondaryQuality of Life Enjoyment and Satisfaction Questionnaire Short Form

The Quality of Life Enjoyment and Satisfaction Questionnaire Short Form is a reliable and valid self-report measure designed to obtain sensitive measures of the degree of enjoyment and satisfaction experienced by individuals. The raw total score ranges from 14 to 70. Higher scores reflect better oucomes.

Time frame:
At baseline and Visit 6 (week 10)
Reported as:
Mean · change in units on a scale
Quality of Life Enjoyment and Satisfaction Questionnaire Short Form
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Quality of Life Enjoyment and Satisfaction Questionnaire Short Form0.1 ± 0.2
SecondaryRange of Impaired Functioning Tool

The Range of Impaired Functioning Tool a brief scale for assessing functional impairment related to medical or psychiatric illness and has been demonstrated to possess good psychometric properties. The LIFE-RIFT has a total score and individual domain scores for the following areas of functioning: household duties, work, recreation, relationships with family, relationships with friends, schoolwork, and global life satisfaction (the satisfaction item is patient rated). Higher scores indicate poorer functioning; scores ≥2 reflect impaired functioning in that domain. Results are reported for the total sum with full range from 3 (no impairment) to 60 (severe impairment), which is based on all individual domain scores.

Time frame:
At baseline and Visit 6 (week 10)
Reported as:
Mean · change in units on a scale
Range of Impaired Functioning Tool
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Range of Impaired Functioning Tool-3.7 ± 4.1
SecondarySheehan Disability Scale

The Sheehan Disability Scale (SDS) is a self-rated scale which assesses illness-related disability in three areas of functioning: work, social and family. The SDS assess disability or functional impairment across three domains: work/school, social life/leisure activities and family life/home responsibilities. Each domain is scored from 0 (not at all) to 10 (very severely). The three domains can be summarized to evaluate global functional impairment by adding the scores of each of the three domains, resulting in global SDS score ranges from 0 (unimpaired) to 30 (highly impaired).

Time frame:
At baseline and Visit 6 (week 10)
Reported as:
Mean · change in units on a scale
Sheehan Disability Scale
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Sheehan Disability Scale-4.3 ± 7.4
SecondaryPatient Rated Inventory of Side Effects (PRISE)

Frequency of observed adverse events over the study treatment period as captured by the PRISE. The Patient Rated Inventory of Side Effects (PRISE) assesses the presence of treatment side effects in nine organ/function systems (gastrointestinal, nervous system, heart, eyes/ears, skin, genital/urinary, sleep, sexual functioning, and other).

Time frame:
up to 12 weeks
Reported as:
Number · events
Patient Rated Inventory of Side Effects (PRISE)
eventsNuedexta (Dextromethorphan/Quinidine)
Patient Rated Inventory of Side Effects (PRISE)25
SecondaryColumbia-Suicide Severity Rating Scale (C-SSRS)

The Columbia-Suicide Severity Rating Scale (C-SSRS) is a comprehensive, semi-structured interview measure that uniquely measures the full spectrum of suicidality including passive and active suicidal ideation, suicidal intent as well as suicidal behaviors. Full range from 0 (low intensity suicidal ideation to 9 (high intensity suicidal ideation).

Time frame:
up to 12 weeks
Reported as:
Mean · change in units on a scale
Columbia-Suicide Severity Rating Scale (C-SSRS)
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Columbia-Suicide Severity Rating Scale (C-SSRS)0.1 ± 0.5
SecondaryQuick Inventory of Depressive Symptomatology, Self Report (QIDS-SR)

The Quick Inventory of Depressive Symptomatology, Self Report (QIDS-SR) is a 16-item self rated instrument designed to assess the severity of depressive symptoms (30). The 16 items cover the nine symptom domains of major depression, and are rated on a scale of 0-3. Total score ranges from 0 to 27, with ranges of 0-5 (normal), 6-10 (mild), 11-15 (moderate), 16-20 (moderate to severe), and 21+ (severe).

Time frame:
up to 12 weeks
Reported as:
Mean · change in units on a scale
Quick Inventory of Depressive Symptomatology, Self Report (QIDS-SR)
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Quick Inventory of Depressive Symptomatology, Self Report (QIDS-SR)-5.9 ± 6.6
SecondaryClinical Global Impression (CGI) Scale

The Clinical Global Impression (CGI) scale assesses overall treatment response in psychiatric patients and has good reliability and validity metrics. The administration time is 2 minutes. This scale consists of three items: Severity of Illness (item 1); Global Improvement (item 2); and Efficacy Index (item 3). Item 1 is rated on a seven-point scale (1 = normal, 7 = among the most extremely ill patients) as is item 2 (1 = very much improved, 7 = very much worse). Full scale is 1 to 14.

Time frame:
up to 12 weeks
Reported as:
Mean · change in units on a scale
Clinical Global Impression (CGI) Scale
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Clinical Global Impression (CGI) Scale-1.5 ± 1.3
SecondaryMassachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ)

The Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ) is a brief scale to measure cognitive and executive dysfunction in mood and anxiety disorders, and possesses good reliability and validity. The Massachusetts General Hospital CPFQ was developed to assess each of the 7 most common complaints of depressed patients reporting fatigue or cognitive/executive problems. The CPFQ consists of 7 questions, each rated on a scale from 1 to 6, with 1 indicating greater than normal functioning, 2 indicating normal functioning and with higher numbers indicating poorer functioning. Total score range from 7 (greater than normal function) to 42 (poor function).

Time frame:
At baseline and Visit 6 (week 10)
Reported as:
Mean · change in units on a scale
Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ)
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ)-4.1 ± 6.5
SecondaryHAM-A

Change in Hamilton Anxiety Rating Scale (HAM-A) score from baseline to Week 10. It consists of 14 items, each defined by a series of symptoms. Each item is rated on a 5-point scale, ranging from 0 (not present) to 4 (severe), with a total score range of 0-56, where \<17 indicates mild severity, 18-24 mild to moderate severity and \>25-30 moderate to severe.

Time frame:
Baseline and Week 10
Reported as:
Mean · change in units on a scale
HAM-A
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
HAM-A-5.7 ± 5.9
SecondaryBeck Scale for Suicidal Ideation (BSI)

Mean change in Brief Inventory Symptom from baseline to week 10. The BSS is a self-report 19-item scale preceded by five screening items. The BSS and its screening items are intended to assess a patient's thoughts, plans and intent to commit suicide. All 24 items are rated on a three-point scale (0 to 2). In this study, scores from the five screening items were included in the overall score. Therefore, total scores could range from 0 to 48, with higher scores reflecting more severe symptoms.

Time frame:
Baseline and Week 10
Reported as:
Mean · change in units on a scale
Beck Scale for Suicidal Ideation (BSI)
change in units on a scaleNuedexta (Dextromethorphan/Quinidine)
Beck Scale for Suicidal Ideation (BSI)-2.5 ± 5.1

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Nuedexta (Dextromethorphan/Quinidine)0/20 (0%)1/20 (5%)20/20 (100%)
Most frequent serious events
Most frequent serious events
EventNuedexta (Dextromethorphan/Quinidine)
InsomniaPsychiatric disorders1/20
Most frequent other events
Showing 10 of 18
Most frequent other events
EventNuedexta (Dextromethorphan/Quinidine)
ConstipationGastrointestinal disorders3/20
Dry MouthGastrointestinal disorders2/20
NauseaGastrointestinal disorders2/20
DizzinessNervous system disorders2/20
SedationNervous system disorders2/20
PalpitationsCardiac disorders1/20
Vision blurredEye disorders1/20
FlatulenceGastrointestinal disorders1/20
FatigueGeneral disorders1/20
MalaiseGeneral disorders1/20

Baseline characteristics

Age, Continuous
Age, Continuous(years)Nuedexta (Dextromethorphan/Quinidine)
Mean49.4 ± 7.7
Sex: Female, Male
Sex: Female, Male(Participants)Nuedexta (Dextromethorphan/Quinidine)
Female9
Male11
Montgomery-Asberg Depression Scale (MADRS)
Montgomery-Asberg Depression Scale (MADRS)(units on a scale)Nuedexta (Dextromethorphan/Quinidine)
Mean32.5 ± 3.9
Clinical Global Impression - Severity (CGI-S)
Clinical Global Impression - Severity (CGI-S)(units on a scale)Nuedexta (Dextromethorphan/Quinidine)
Mean4.5 ± 0.5
08

Study locations

1 site
  • Icahn School of Medicine at Mount Sinai
    New York, New York 10029, United States
09

References and documents

Publications

  • Murrough JW, Wade E, Sayed S, Ahle G, Kiraly DD, Welch A, Collins KA, Soleimani L, Iosifescu DV, Charney DS. Dextromethorphan/quinidine pharmacotherapy in patients with treatment resistant depression: A proof of concept clinical trial. J Affect Disord. 2017 Aug 15;218:277-283. doi: 10.1016/j.jad.2017.04.072. Epub 2017 Apr 29. PubMed 28478356 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 11, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01882829
Lead sponsor
James Murrough
Responsible party
James Murrough (Assistant Professor, Icahn School of Medicine at Mount Sinai) — Sponsor-investigator
First posted
Jun 20, 2013
Start date
Jul 2013
Primary completion
Mar 2016
Completion
Mar 2016
Results posted
Jun 11, 2018
Last update
Jun 11, 2018

Study contacts

James Murrough, MD
principal investigator · Icahn School of Medicine at Mount Sinai

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in May 2018. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion