Anxiety DisorderPhase 2NCT00001482
New Drugs in the Treatment of Mood Disorders
A Phase 2 study testing Lamotrigine (Lamictal® (Registered Trademark) and Gabapentin (Neurontin® (Registered Trademark)) in people with Anxiety Disorder and Mood Disorder, run by National Institute of Mental Health (NIMH) at 1 site in United States.
Trial summary
This clinical study compares the effectiveness of two anticonvulsants Lamotrigine (Lamictal) Monotherapy and Gabapentin (Neurontin) in patients with treatment resistant affective disorders. We initially have found that the response rate to lamotrigine (51%) exceeded that of gabapentin (28%) or placebo (21%). Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Anxiety Disorder, Mood Disorder, Psychotic Disorder
- What is being tested?
- Lamotrigine (Lamictal® (Registered Trademark) and Gabapentin (Neurontin® (Registered Trademark))
- How many people
- 60 participants
- Where
- 1 siteUnited States
- Study dates
- May 1995to May 2001
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Patients between the ages of 18 and 75 who satisfy DSM-III-R criteria for mood disorders, are refractory to at least two conventional treatments, and are inpatients or outpatients at the NIMH are invited to participate provided that the following criteria are fulfilled:
Subjects having serious medical illness (or meeting current psychoactive substance dependence will be excluded from entry.)
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institute of Mental Health (NIMH)
Bethesda, Maryland, 20892
About this study
Official title: Evaluation of Lamotrigine (Lamictal® (Registered Trademark)) Monotherapy and Gabapentin (Neurontin® (Registered Trademark)) Monotherapy in the Treatment of Mood Disorders
This clinical study compares the effectiveness of two anticonvulsants Lamotrigine (Lamictal) Monotherapy and Gabapentin (Neurontin) in patients with treatment resistant affective disorders. We initially have found that the response rate to lamotrigine (51%) exceeded that of gabapentin (28%) or placebo (21%). In this study the placebo phase has been dropped so that we examine possible clinical and biological factors predictors of response. The drugs will be given in a randomized order for six weeks each and you will not know when you are on a given one. There will be a 2-4 week "washout" period between treatments. If you respond well to one of these treatments, a longer open continuation period will be offered at the end of this study. This would involve one or both drugs in combination. A variety of rating scales and brain imaging procedures will also be offered before and during each drug evaluation. Both lamotrigine and gabapentin are generally well tolerated. A serious potentially life threatening rash occurs in about 1/500 patients treated with lamotrigine, however. Common side effects are rash, dizziness, unsteadiness, double vision, blurred vision, nausea, vomiting, insomnia, sedation, and headache. These side effects are usually mild, and resolve with continued time on the drug or a decrease in dosage.
Read the detailed description
The anticonvulsants carbamazepine (CBZ) and valproate (VPA) have efficacy in the treatment of mood disorders, suggesting that other anticonvulsants with related mechanisms of action may have similar utility. Additional treatments are sorely needed because many patients with recurrent affective disorder have symptoms refractory to treatment with conventional agents, including lithium, carbamazepine, and valproate. This refractory group is the major focus of our investigative efforts on 3-west in the Section of Psychobiology, NIMH. Moreover, establishing differential clinical and biological predictors of response has become increasingly important both to rapid allocation of appropriate treatment and as they may supply insight into the pathophysiology of the mood disorders and their subtypes.
Lamotrigine, a phenyltriazine use-dependent sodium channel blocker that inhibits release of excitatory amino acids, is a new anticonvulsant with fewer side effects than older agents and was recently approved by the FDA as adjunctive therapy in the treatment of partial seizures. Heretofore, only preliminary open clinical evidence suggested that lamotrigine may have mood stabilizing properties.
Gabapentin is a neutral amino acid and gamma-aminobutyric acid (GABA) analog which increases brain GABA levels and has fewer side effects than older agents and does not require hematological or hepatic monitoring. Preliminary evidence only from open "add-on" series had suggested that gabapentin therapy might have antidepressant and antianxiety effects, if not mood stabilizing properties.
We wish to evaluate the efficacy of lamotrigine and gabapentin in the refractory mood disorders. We also wish to examine the neurobiology and phenomenology of lamotrigine and gabapentin responders and nonresponders to ascertain potential predictors and concomitants of response to these medications. This study may lead to improvement in the treatment and understanding of mood disorders by providing controlled data on efficacy of these potential new treatments, potential predictors of response, and further insights into the pathophysiology of mood disorders.
- Conditions
- Anxiety Disorder, Mood Disorder, Psychotic Disorder
- Being tested
- Lamotrigine (Lamictal® (Registered Trademark), Gabapentin (Neurontin® (Registered Trademark))
- Keywords
- Anticonvulsants, Bipolar Disorder, Depression, Gabapentin, Lamotrigine, Mania, Mood Disorders
- Medical subject headings
- Anxiety Disorders, Mood Disorders, Psychotic Disorders, Bipolar Disorder, Depression, Mania
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Lamotrigine (Lamictal® (Registered Trademark)Drug
Gabapentin (Neurontin® (Registered Trademark))Drug
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Dec 2002 (estimated)
- Study startMay 1995
- Study completionMay 2001
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Anxiety DisorderStudies of the same condition, open and under way.
- More trials run by National Institute of Mental Health (NIMH)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Enrolment
- 60 participants
Sponsor and investigators
- Lead sponsor
- National Institute of Mental Health (NIMH)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00001482
- Sponsor's protocol ID
- 950115
- Other IDs
- 95-M-0115
- Status last verified
- Jun 2000
- First submitted
- 3 Nov 1999
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Frye MA, Ketter TA, Kimbrell TA, Dunn RT, Speer AM, Osuch EA, Luckenbaugh DA, Cora-Ocatelli G, Leverich GS, Post RM. A placebo-controlled study of lamotrigine and gabapentin monotherapy in refractory mood disorders. J Clin Psychopharmacol. 2000 Dec;20(6):607-14. doi: 10.1097/00004714-200012000-00004.
PubMed 11106131
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Lamotrigine (Lamictal® (Registered Trademark)) Monotherapy and Gabapentin (Neurontin® (Registered Trademark)) Monotherapy in the Treatment of Mood Disorders
- ClinicalTrials.gov ID
- NCT00001482
- Acronym / sponsor ID
- 950115
- Conditions
- Anxiety Disorder, Mood Disorder, Psychotic Disorder
- Keywords
- Anticonvulsants, Bipolar Disorder, Depression, Gabapentin, Lamotrigine, Mania, Mood Disorders
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants
- Lead sponsor
- National Institute of Mental Health (NIMH)US National Institutes of Health
- Study start
- May 1995
- Study completion
- May 2001
- First posted
- 10 Dec 2002 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This clinical study compares the effectiveness of two anticonvulsants Lamotrigine (Lamictal) Monotherapy and Gabapentin (Neurontin) in patients with treatment resistant affective disorders. We initially have found that the response rate to lamotrigine (51%) exceeded that of gabapentin (28%) or placebo (21%). In this study the placebo phase has been dropped so that we examine possible clinical and biological factors predictors of response. The drugs will be given in a randomized order for six weeks each and you will not know when you are on a given one. There will be a 2-4 week "washout" period between treatments. If you respond well to one of these treatments, a longer open continuation period will be offered at the end of this study. This would involve one or both drugs in combination. A variety of rating scales and brain imaging procedures will also be offered before and during each drug evaluation. Both lamotrigine and gabapentin are generally well tolerated. A serious potentially life threatening rash occurs in about 1/500 patients treated with lamotrigine, however. Common side effects are rash, dizziness, unsteadiness, double vision, blurred vision, nausea, vomiting, insomnia, sedation, and headache. These side effects are usually mild, and resolve with continued time on the drug or a decrease in dosage.
Detailed description
The anticonvulsants carbamazepine (CBZ) and valproate (VPA) have efficacy in the treatment of mood disorders, suggesting that other anticonvulsants with related mechanisms of action may have similar utility. Additional treatments are sorely needed because many patients with recurrent affective disorder have symptoms refractory to treatment with conventional agents, including lithium, carbamazepine, and valproate. This refractory group is the major focus of our investigative efforts on 3-west in the Section of Psychobiology, NIMH. Moreover, establishing differential clinical and biological predictors of response has become increasingly important both to rapid allocation of appropriate treatment and as they may supply insight into the pathophysiology of the mood disorders and their subtypes.
Lamotrigine, a phenyltriazine use-dependent sodium channel blocker that inhibits release of excitatory amino acids, is a new anticonvulsant with fewer side effects than older agents and was recently approved by the FDA as adjunctive therapy in the treatment of partial seizures. Heretofore, only preliminary open clinical evidence suggested that lamotrigine may have mood stabilizing properties.
Gabapentin is a neutral amino acid and gamma-aminobutyric acid (GABA) analog which increases brain GABA levels and has fewer side effects than older agents and does not require hematological or hepatic monitoring. Preliminary evidence only from open "add-on" series had suggested that gabapentin therapy might have antidepressant and antianxiety effects, if not mood stabilizing properties.
We wish to evaluate the efficacy of lamotrigine and gabapentin in the refractory mood disorders. We also wish to examine the neurobiology and phenomenology of lamotrigine and gabapentin responders and nonresponders to ascertain potential predictors and concomitants of response to these medications. This study may lead to improvement in the treatment and understanding of mood disorders by providing controlled data on efficacy of these potential new treatments, potential predictors of response, and further insights into the pathophysiology of mood disorders.
Study design
- Primary purpose
- Treatment
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Lamotrigine (Lamictal® (Registered Trademark) | Drug | – |
| Gabapentin (Neurontin® (Registered Trademark)) | Drug | – |
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 11106131Frye MA, Ketter TA, Kimbrell TA, Dunn RT, Speer AM, Osuch EA, Luckenbaugh DA, Cora-Ocatelli G, Leverich GS, Post RM. A placebo-controlled study of lamotrigine and gabapentin monotherapy in refractory mood disorders. J Clin Psychopharmacol. 2000 Dec;20(6):607-14. doi: 10.1097/00004714-200012000-00004.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Lamotrigine (Lamictal® (Registered Trademark) and Gabapentin (Neurontin® (Registered Trademark)) in people with Anxiety Disorder and Mood Disorder, run by National Institute of Mental Health (NIMH) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00001482, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.