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Status unknownNCT03039842Updated Jul 11, 2017

Combination of Dextromethorphan and Memantine in Treating Bipolar Disorder

A Phase 3 interventional study of Dextromethorphan and Memantine in Bipolar Disorder II, sponsored by National Cheng-Kung University Hospital. Status unknown at 1 site in Taiwan. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2017-07-11.

Sponsored by National Cheng-Kung University Hospital · Phase 3, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Jul 2017), so the status shown — last known as Enrolling by invitation — may be out of date.

From the registry’s dates

  • Registered 1 year 7 months after the study started (first participant enrolled Jan 2013, registered Aug 2014).
Phase
Phase 3
Study type
Interventional
Enrollment
300
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

This is a research clinical trial of double-blind, stratified randomized, parallel group, two-centre study. It will be conducted in a total of 250\~300 male and female subjects from the Department of Psychiatry at National Cheng Kung University Hospital. Eligible subjects will be psychiatric out- and in-patients, aged between 18\~65 years old, who have psychiatric evaluation with clinically suspected of having bipolar II disorder and fulfill the inclusion and exclusion criteria. The add-on double-blind study treatment with dextromethorphan/place will commence at randomization for while patients continue open-label valproate. Subjects will be enrolled for 12 weeks double-blind add-on treatment and randomly assigned to (1) 30mg dextromethorphan+valproate, (2) 5mg memantine+valproate, (3) dextromethorphan+memantine+valproate or (4) placebo+valproate. Concomitant benzodiazepine medication (preferably up to 8mg lorazepam) may be used for daytime sedation, agitation or insomnia during the study. For the consideration of the less influence to immune-system, resperidone 1-3mg/daily and fluoxetine maximum 20mg/daily will be chose. We will measure the treatment response and side effect to clarify the curative effect of DM and memantine add-on therapy to valproate in the treatment of bipolar disorders. This study is being performed to investigate the possibly significant beneficial effects on the subtypes of bipolar disorders psychopathology.

Read the detailed description

A total of 250\~300 male and female subjects from the Department of Psychiatry at National Cheng Kung University Hospital. Eligible subjects who are aged between 18\~65 years old and clinically suspected of having bipolar II disorder are invited. The add-on double-blind study treatment with dextromethorphan/place will commence at randomization for while patients continue open-label valproate. Subjects will be enrolled for 12 weeks double-blind add-on treatment and randomly assigned to (1) 30mg dextromethorphan+valproate, (2) 5mg memantine+valproate, (3) dextromethorphan+memantine+valproate or (4) placebo+valproate. Concomitant benzodiazepine medication (preferably up to 8mg lorazepam) may be used for daytime sedation, agitation or insomnia during the study. For the consideration of the less influence to immune-system, resperidone 1-3mg/daily and fluoxetine maximum 20mg/daily will be chose. We will measure the treatment response and side effect to clarify the curative effect of DM and memantine add-on therapy to valproate in the treatment of bipolar disorders. This study is being performed to investigate the possibly significant beneficial effects on the subtypes of bipolar disorders psychopathology.

02

Conditions studied

  • Bipolar Disorder II

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Keywords

  • dextromethorphan; memantine; treatment response
03

In context

Bipolar Disorder

1,601 studies on the registry are indexed under Bipolar Disorder; 254 are open to participants now.

This study's planned enrollment of 300 is above the median of 64 across 1,223 interventional studies indexed under Bipolar Disorder.

Browse Bipolar Disorder studies →

Lead sponsor

National Cheng-Kung University Hospital is the lead sponsor of 268 studies on the registry; 68 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

  • A 2-day minimum for hypomania to diagnose bipolar II disorder
  • A total of Hamilton Rating Scale for Depression scored at least 18 or Young Mania Rating Scale scored at least 14 at the screening stage
  • Must allow to ensure acceptable compliance and visit

Exclusion criteria

Exclusion Criteria:

  • Pregnant females or nursing
  • Women of childbearing potential not using adequate contraception
  • Received dextromethorphan, memantine, other antiinflammatory medication within 1 week prior
  • Clinically significant medical condition (cardiac, hepatic and renal disease)
  • Received electroconvulsive therapy patients within 4 weeks prior to the first dose of double-blind medication
  • Increase in total SGOT, SGPT, BUN and creatinine by more than 3X upper limit of normal.
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
300 participants (estimated)

Study arms

  • Experimental
    30 mg DM

    30mg dextromethorphan+valproate

    Drug: Dextromethorphan

  • Experimental
    5 mg MM

    5mg memantine+valproate

    Drug: Memantine

  • Experimental
    DM+MM

    dextromethorphan+memantine+ valproate

    Drug: dextromethorphan+memantine

  • Placebo comparator
    placebo

    Placebo+valproate

    Drug: placebo+valproate

Interventions

  • DrugDextromethorphan

    Also known as: 30mg dextromethorphan

  • DrugMemantine

    Also known as: 5mg memantine+valproate

  • Drugdextromethorphan+memantine
  • Drugplacebo+valproate
06

What researchers measure

Primary outcomes

  1. treatment change assessed by plasma levels of cytokines (e.g., IL-6, IL-8)

    change assessment

    Time frame: baseline, week 1, week 2, week 4, week 8, week 12

Secondary outcomes

  1. depression change change

    depression change assessed by Hamilton Depression Rating Scale

    Time frame: baseline, week 1, week 2, week 4, week 8, week 12

  2. manic state change

    Manic symptom assessed by Young Mania Rating Scale

    Time frame: baseline, week 1, week 2, week 4, week 8, week 12

Other outcomes

  1. attention function change

    attention change assessed by CPT

    Time frame: baseline, week 12

  2. memory change

    memory change assessed by WMS

    Time frame: baseline, week 12

  3. executive functioning change

    executive function change assessed by WCST

    Time frame: baseline, week 12

07

Study locations

1 site
  • National Cheng Kung University Hospital
    Tainan, 704, Taiwan
08

References and documents

Publications

  • Lee SY, Wang TY, Chen SL, Chang YH, Chen PS, Huang SY, Tzeng NS, Wang LJ, Lee IH, Chen KC, Yang YK, Hong JS, Lu RB. Combination of dextromethorphan and memantine in treating bipolar spectrum disorder: a 12-week double-blind randomized clinical trial. Int J Bipolar Disord. 2020 Mar 2;8(1):11. doi: 10.1186/s40345-019-0174-8. PubMed 32115672 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 11, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03039842
Lead sponsor
National Cheng-Kung University Hospital
Responsible party
Ru-Band Lu (Distinguished Professor, National Cheng-Kung University Hospital) — Principal investigator
First posted
Feb 1, 2017
Start date
Jan 1, 2013
Primary completion
Dec 31, 2016
Completion
Dec 31, 2017 (estimated)
Last update
Jul 11, 2017

Study contacts

Ru-Band Lu, MD
principal investigator · Department of Psychiatry, National Cheng Kung University

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Jul 2017. You cannot join it, but the record below documents what was studied.

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