- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00523718
Riluzole Augmentation in Treatment-refractory Obsessive-compulsive Disorder
A Double-blind Study of Riluzole Augmentation in Serotonin Reuptake Inhibitor-refractory Obsessive-compulsive Disorder and Depression
Obsessive-compulsive disorder (OCD) affects 2-3% of the population and leads to a great deal of suffering. Many patients benefit from established treatments, the mainstay of which are cognitive behavioral therapy and a group of antidepressant medications known as serotonin reuptake inhibitors. However, 20-30% of patients get minimal benefit from these established therapeutic strategies. New avenues of treatment are urgently needed.
Existing medications for obsessive-compulsive disorder affect the neurotransmitters serotonin or dopamine; but increasing evidence suggests that functional disruptions of a different neurotransmitter, glutamate, may contribute to some cases of OCD. The investigators are therefore interested in using medications that target glutamate as novel treatment options for those OCD patients who do not benefit from established treatments.
One such medication is the drug riluzole, which is FDA approved for amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, but may be of benefit to patients with psychiatric disorders due to its ability to moderate excessive glutamate. In preliminary studies, in which the investigators treated patients with riluzole (in addition to their established pharmacological regimen) in an open-label fashion (that is, without a placebo-treated control group), the investigators have found about 40-50% of patients to substantially improve over 2-3 months.
While immensely promising, these preliminary studies do not prove riluzole is truly a new beneficial medication for the treatment of OCD; a more rigorous placebo-controlled trial is needed for that purpose. The investigators are therefore now recruiting patients to participate in a double-blind, placebo-controlled trial of riluzole, added to whatever other OCD medications they are taking.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
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Connecticut
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New Haven, Connecticut, United States, 06508
- Yale OCD Research Clinic
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Diagnostic and Statistical Manual of Mental Disorders IV (DSM-IV) diagnosis of OCD, confirmed by Structured Clinical Interview for DSM-IV (SCID-IV); symptoms of at least 1 year duration
- moderate to severe OCD symptoms as measured by a score on the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) of 16 or greater
- documented failure of an adequate trial of a selective serotonin reuptake inhibitor (SSRI)
- agreement to engage in a reliable form of birth control (women only)
Exclusion Criteria:
- primary diagnosis of a psychotic disorder
- active substance abuse or dependence
- unstable medical condition
- prior exposure to riluzole
- prior psychosurgery
- pregnancy, breastfeeding, or intent to become pregnant during study
- liver function tests (LFTs) elevated to more than 2x the upper limit of normal
- evidence of active liver disease
- seizure disorder
- active suicidal ideation
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: riluzole
Patients randomized to this arm will receive riluzole augmentation, at a standard, fixed dose (50 mg bid), in addition to the medication regimen they are on at enrollment
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50 mg PO bid, 12 weeks
Other Names:
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Placebo Comparator: placebo
Patients randomized to this arm will receive placebo, formulated to be indistinguishable from riluzole, in addition to the medication regimen they are on at study enrollment.
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placebo, 1 capsule PO bid, 12 weeks
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Partial Responders by Yale-Brown Obsessive-Compulsive Scale (Y-BOCS)
Time Frame: 14 weeks
|
The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) is a test to rate the severity of obsessive-compulsive disorder (OCD) symptoms. The scale is a clinician-rated, 10-item scale, each item rated from 0 (no symptoms) to 4 (extreme symptoms), yielding a total possible score range from 0 to 40. The results can be interpreted based on the total score: 0-7 is sub-clinical; 8-15 is mild; 16-23 is moderate; 24-31 is severe; 32-40 is extreme. Improvement was defined apriori as a 25% improvement from baseline |
14 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Average Hamilton Depression Inventory (HAM-D)
Time Frame: 14 weeks
|
The HDRS (also known as the HAM-D) is the most widely used clinician-administered depression assessment scale.
The HAM-D 17-item scale ranges from 0 (normal) to >23 (very severe depression), with a maximum score of 52.
The 24-item scale has a maximum score of 75.
Severity of depression (e.g.
"normal" or "very severe") is based upon the score in the first 17-items.
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14 weeks
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Average Hamilton Anxiety Inventory (HAM-A)
Time Frame: 14 weeks
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The Hamilton Anxiety Rating Scale (HARS or HAM-A) is a psychological questionnaire used by clinicians to rate the severity of a patient's anxiety.
Total score ranges from 0 to 56.
A score of 17 or less indicates mild anxiety severity.
A score from 18 to 24 indicates mild to moderate anxiety severity.
A score of 25 to 30 indicates a moderate to severe anxiety severity.
A score of 31 or greater represents very severe anxiety severity.
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14 weeks
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Clinical Global Impression (CGI) - Severity of Illness Item
Time Frame: 14 weeks
|
The Clinical Global Impression - Severity scale (CGI-S) is a 7-point scale that requires the clinician to rate the severity of the patient's illness at the time of assessment, relative to the clinician's past experience with patients who have the same diagnosis.
Considering total clinical experience, a patient is assessed on severity of mental illness at the time of rating 1, normal, not at all ill; 2, borderline mentally ill; 3, mildly ill; 4, moderately ill; 5, markedly ill; 6, severely ill; or 7, extremely ill.
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14 weeks
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Collaborators and Investigators
Sponsor
Collaborators
Publications and helpful links
General Publications
- Pittenger C, Krystal JH, Coric V. Glutamate-modulating drugs as novel pharmacotherapeutic agents in the treatment of obsessive-compulsive disorder. NeuroRx. 2006 Jan;3(1):69-81. doi: 10.1016/j.nurx.2005.12.006.
- Coric V, Taskiran S, Pittenger C, Wasylink S, Mathalon DH, Valentine G, Saksa J, Wu YT, Gueorguieva R, Sanacora G, Malison RT, Krystal JH. Riluzole augmentation in treatment-resistant obsessive-compulsive disorder: an open-label trial. Biol Psychiatry. 2005 Sep 1;58(5):424-8. doi: 10.1016/j.biopsych.2005.04.043.
- Pittenger C, Bloch MH, Williams K. Glutamate abnormalities in obsessive compulsive disorder: neurobiology, pathophysiology, and treatment. Pharmacol Ther. 2011 Dec;132(3):314-32. doi: 10.1016/j.pharmthera.2011.09.006. Epub 2011 Sep 22.
- Pittenger C, Bloch MH, Wasylink S, Billingslea E, Simpson R, Jakubovski E, Kelmendi B, Sanacora G, Coric V. Riluzole augmentation in treatment-refractory obsessive-compulsive disorder: a pilot randomized placebo-controlled trial. J Clin Psychiatry. 2015 Aug;76(8):1075-84. doi: 10.4088/JCP.14m09123.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Mental Disorders
- Pathologic Processes
- Personality Disorders
- Anxiety Disorders
- Disease
- Compulsive Personality Disorder
- Obsessive-Compulsive Disorder
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Excitatory Amino Acid Antagonists
- Excitatory Amino Acid Agents
- Neuroprotective Agents
- Protective Agents
- Anticonvulsants
- Riluzole
Other Study ID Numbers
- 0509000614
- R34MH083115 (U.S. NIH Grant/Contract)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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