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Lamotrigine add-on Therapy for Bipolar Disorder and Cocaine Dependency

This study has been completed.
Information provided by (Responsible Party):
Sherwood Brown, University of Texas Southwestern Medical Center Identifier:
First received: January 19, 2006
Last updated: July 30, 2013
Last verified: July 2013
The purpose of this study is to determine if lamotrigine add-on therapy is associated with decreased cocaine craving and improvement in depressive symptom severity than placebo in a group of outpatients with bipolar disorder and cocaine dependence. Additionally, this study is examining whether lamotrigine add-on therapy is associated with decreased cocaine use and the improvement of manic symptom severity than placebo in a group of outpatients with bipolar disorder and cocaine dependence.

Condition Intervention Phase
Bipolar Disorder
Cocaine Dependence
Drug: Lamotrigine
Drug: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized, Double-blind, Placebo-controlled, Trial of Lamotrigine add-on Therapy in Outpatients With Bipolar Disorder, Depressed or Mixed Phase and Cocaine Dependence

Resource links provided by NLM:

Further study details as provided by Sherwood Brown, University of Texas Southwestern Medical Center:

Primary Outcome Measures:
  • Days of Cocaine Use [ Time Frame: 10 weeks ]
    Number of days of cocaine use during the 7 days that comprise week 10 of the protocol, by self report, or at last assessment if participant withdrew early, as assessed by the Timeline Followback method.

  • Positive Urine Drug Screens [ Time Frame: 10 weeks ]
    Percentage of participants with a positive urine drug screen for cocaine at the week 10 visit or at last assessment if participant withdrew early.

Secondary Outcome Measures:
  • Depression Score on the Hamilton Rating Scale For Depression [ Time Frame: 10 weeks ]
    Total score on the Hamilton Rating Scale for Depression at week 10 visit or at last assessment if participant withdrew early(total score values range 0 - 52. A higher score indicates more severe depression.

  • Dollars Spent [ Time Frame: 10 weeks ]
    Dollars spent on cocaine during the 7 days of week 10, or at last assessment if participant withdrew early, based on self report.

Enrollment: 112
Study Start Date: March 2006
Study Completion Date: January 2010
Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: 1
Drug: Placebo
Active Comparator: 2
Drug: Lamotrigine

Detailed Description:

One hundred and twenty (120) adult outpatients with bipolar I, II, not otherwise specified, or cyclothymic disorder and current cocaine dependence will be enrolled. After obtaining informed consent baseline assessment measures will be administered including the Structured Clinical Interview for Diagnostic Statistical Manual-IV Axis I Disorders. Drug use will be assessed using the timeline-followback method to quantify days and amount of drug use, urine drug screens will also be obtained and craving will be assessed with the Cocaine Craving Questionnaire. Mood symptoms will be quantified at each weekly visit with the Hamilton Rating Scale for Depression (17-item version), Quick Inventory of Depressive Symptomatology-SR (QIDS-SR), and Young Mania Rating Scale (YMRS). Impulsivity will be assessed at weeks 0, 5 and 10 with the Barratt Impulsiveness Scale (BIS, Barratt et al 1983). Cognition will be assessed at weeks 0, 5, and 10 with the Rey Auditory Verbal Learning Test (RAVLT) and STROOP color-word task. The Addiction Severity Index (ASI) will be administered at baseline and week 10. The Psychobiology of Recovery in Depression-III Somatic Symptom Scale (PRD-III)will be administered every 2 weeks to track side effects. A study psychiatrist will assess participant-reported side effects weekly. Women of childbearing age will be given a test to rule out pregnancy. Subjects will be randomized and Lamotrigine therapy or identical appearing placebo add-on therapy in a double- blind fashion will be initiated at 25 mg/day and increased to 200 mg/day using a slow upward titration over 5 weeks (as outlined by Calabrese et al 2000 and following the package insert) to minimize risk of side effects such as rash. After that time additional increases in 100 mg/day increments to a maximum of 400 mg/day can be made if the medication is well tolerated and HRSD scores have decreased by ≤ 40% from baseline or Cocaine Craving Questionaire (CCQ) scores have decreased ≤ 25% from baseline or participants continue to use cocaine in past week based on either self-report or urine drug screen results. Subjects will be assessed weekly for mood and drug use/craving and every four weeks for cognition over 10 weeks. All of the assessments may be provided in Spanish, if needed. Additionally, a Spanish-speaking research assistant and study psychiatrist will be available at all times.

Subjects will be paid $30 for each visit and given $2 restaurant coupons. Parking tokens ($3) or bus passes ($2) will also be provided. Concomitant medications will be managed with an algorithm that discourages but, if necessary, allows changes in other psychiatric medications. At the completion of 10 weeks of blinded therapy participants in both groups will be offered 4 weeks of open-label therapy either continuing at the week 10 dose in those on active medication or slowly titrated upward for those on placebo. Participants will be assessed with the HRSD, QIDS-SR, YMRS, CCQ and drug use quantified at biweekly appointments with the RAVLT and STROOP also administered at week 14 exit. Participants will not be paid for participation in the open-label phase but bus tokens and parking passes will be provided.


Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Diagnosis of bipolar I, II, not otherwise specified or cyclothymic disorders
  • Currently depressed or mixed mood state
  • Ages 18-70 years
  • Men or women
  • Self-reported cocaine use within 14 days prior to randomization
  • English or Spanish speaking
  • Baseline Hamilton Depression Rating Scale (HRSD17) score ≥ 10

Exclusion Criteria:

  • Currently taking an enzyme inducing or inhibiting anticonvulsant (e.g. valproic acid, carbamazepine)
  • Current severe psychotic features (e.g. daily auditory hallucinations, fixed delusions, severely disorganized thought processes) that require antipsychotic therapy, and that do not appear to be secondary to cocaine use
  • Active suicidal ideation (plan and intent) or ≥2 attempts in past 12 months or any attempt in the past month
  • Highly unstable medical condition
  • Change in concomitant psychiatric medications (e.g. initiated antipsychotic) or in other substance abuse treatment (e.g. began intensive outpatient treatment) within 7 days prior to study entry
  • Vulnerable populations (e.g. pregnant or nursing women, prisoners, mentally retarded)
  Contacts and Locations
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Please refer to this study by its identifier: NCT00280293

United States, Texas
UT Southwestern Medical Center at Dallas
Dallas, Texas, United States, 75390-8849
Sponsors and Collaborators
University of Texas Southwestern Medical Center
Principal Investigator: E. Sherwood Brown, M.D., Ph.D. UT Southwestern Medical Center at Dallas
  More Information

Additional Information:
Responsible Party: Sherwood Brown, Principal Investigator, MD/PhD, University of Texas Southwestern Medical Center Identifier: NCT00280293     History of Changes
Other Study ID Numbers: 05T-704
Study First Received: January 19, 2006
Results First Received: May 13, 2013
Last Updated: July 30, 2013

Keywords provided by Sherwood Brown, University of Texas Southwestern Medical Center:
Bipolar Disorder
Cocaine Dependence
Dual Diagnosis

Additional relevant MeSH terms:
Bipolar Disorder
Cocaine-Related Disorders
Pathologic Processes
Bipolar and Related Disorders
Mental Disorders
Substance-Related Disorders
Chemically-Induced Disorders
Anesthetics, Local
Central Nervous System Depressants
Physiological Effects of Drugs
Sensory System Agents
Peripheral Nervous System Agents
Vasoconstrictor Agents
Dopamine Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Dopamine Agents
Neurotransmitter Agents
Calcium Channel Blockers
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents
Voltage-Gated Sodium Channel Blockers
Sodium Channel Blockers processed this record on May 25, 2017