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Memantine Augmentation of Lamotrigine Incomplete-Response in Bipolar Depression

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: March 22, 2006
Last Update Posted: July 18, 2016
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.
Information provided by (Responsible Party):
Indiana University ( Indiana University School of Medicine )
The purpose of this study is to investigate whether addition of memantine to bipolar depression patients who have had an incomplete response to lamotrigine (Lamictal) which is frequently used to treat bipolar depression in the clinical setting. At present, memantine is approved for use in the treatment of Alzheimer's disease or dementia, but not for use for the treatment of bipolar depression. Subjects will be asked to participate because they are suffering from bipolar depression associated and have had an inadequate response to lamotrigine. Subjects will have to be on at least 100 mg per day, for at least 4 weeks.

Condition Intervention Phase
Bipolar Depression Drug: Memantine Drug: Placebo Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: Memantine Augmentation of Lamotrigine Incomplete Response in Bipolar Depression: A Randomized Placebo Controlled Clinical Trial

Resource links provided by NLM:

Further study details as provided by Indiana University ( Indiana University School of Medicine ):

Primary Outcome Measures:
  • Change in 17-item Hamilton Depression Rating Scale From Baseline to 8 Weeks (Baseline - 8 Wks) [ Time Frame: 8 weeks ]
    Scale for measurement of depression severity. Total of scale is used. Total range is from 0 - 50 with higher score signifying higher severity of depression. Outcome measure is change in score from baseline to 8 wks.

Enrollment: 29
Study Start Date: August 2005
Study Completion Date: December 2011
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Placebo
Placebo daily
Drug: Placebo
No active medication, only placebo
Active Comparator: Memantine
Daily dose Memantine
Drug: Memantine
Memantine will be given orally. Subjects will be started at a dose of 5 mg for the first week and then increased by 5 mg every week up to a maximum of 20 mg depending on response and tolerance and will be kept at that level for the rest of the study. This is an 8 week study.
Other Name: Memantine or Namenda

Detailed Description:


H1: Lamotrigine inadequate-response patients augmented with memantine for 8 weeks will have significantly greater improvement on the Hamilton Depression Rating Scale (HDRS) and Clinical Global Improvement (CGI) scale compared to patients augmented with placebo.

H2: Lamotrigine inadequate-response patients augmented with memantine for 8 weeks will have significantly greater improvement of scores on the Selective Reminding Test (SRT), the Digit Span Test, the Stroop Test, and Trail Making Test (TMT) than patients augmented with placebo.

Study Population:

We will study 40 bipolar disorder depressed (BDD) outpatients (20 in each arm) recruited from the outpatient Mood Disorders Clinic and by advertisement.


Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:: 1) age 18 - 65; 2) satisfy DSM-IV-TR criteria for Bipolar Disorder and Major Depressive Episode; 3) Lamotrigine Inadequate-Response: Defined as already treated with at least 100 mg of lamotrigine for at least 4 weeks but 17 item HDRS rating > 15; 4) give informed consent as approved by local IRB; 5) if on other antidepressants or mood stabilizers on stable dose for the past 4 weeks.

Exclusion Criteria:1) comorbid psychotic disorder such as schizophrenia or schizoaffective disorder; 2) significant suicidal or homicidal risk; 3) clinically significant medical illness; 4) allergy or intolerance to lamotrigine or memantine; 5) pregnancy, planning to be pregnant or not using adequate contraception; 6) satisfy criteria for substance dependence within 6 months prior to start of the study; and 7) on any medication with significant adverse interaction with either lamotrigine or memantine.

  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00305578

United States, Indiana
Indiana University Adult Psychiatric Clinic
Indianapolis, Indiana, United States, 46202
Sponsors and Collaborators
Indiana University School of Medicine
Principal Investigator: Amit Anand, MD Indiana University School of Medicine
  More Information

Responsible Party: Indiana University School of Medicine
ClinicalTrials.gov Identifier: NCT00305578     History of Changes
Other Study ID Numbers: 0501-43
First Submitted: September 14, 2005
First Posted: March 22, 2006
Results First Submitted: June 30, 2015
Results First Posted: November 2, 2015
Last Update Posted: July 18, 2016
Last Verified: June 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by Indiana University ( Indiana University School of Medicine ):
Incomplete Response

Additional relevant MeSH terms:
Depressive Disorder
Bipolar Disorder
Behavioral Symptoms
Mood Disorders
Mental Disorders
Bipolar and Related Disorders
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents
Calcium Channel Blockers
Membrane Transport Modulators
Voltage-Gated Sodium Channel Blockers
Sodium Channel Blockers