Cocaine Use DisordersPhase 2NCT00780442
D-Cycloserine and Cue Exposure in Cocaine-Dependent Individuals
A Phase 2 study testing D-cycloserine in people with Cocaine Use Disorders, run by Medical University of South Carolina at 1 site in United States.
Trial summary
In summary, this pilot study will explore the use of an innovative pharmacologic approach to the treatment of substance dependence through the facilitation of extinction of response to cocaine-conditioned cues in cocaine-dependent individuals. Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Cocaine Use Disorders
- What is being tested?
- D-cycloserine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 27 participants
- Where
- 1 siteUnited States
- Study dates
- Sep 2006to Jul 2008
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subjects must be able to provide informed consent and function at an intellectual level sufficient to allow accurate completion of all assessment instruments.
- Subjects must meet DSM-IV criteria for current cocaine dependence. Subjects may meet criteria for abuse, but not dependence on any other substance within the past 60 days with the exception of nicotine. Because of the high comorbidity of cocaine and nicotine dependence, excluding nicotine dependence would seriously compromise the feasibility of recruitment. Nicotine use immediately prior to the testing session will be controlled. Alcohol has also been known to affect HPA function, however to enhance recruitment efforts individuals with alcohol dependence or abuse will be included in the study if they do not require medically supervised detoxification.
- Use of one of the following methods of birth control by female subjects: barrier methods (diaphragm or condoms with spermicide or both), surgical sterilization, use of an intra-uterine contraceptive device, or complete abstinence from sexual intercourse.
- Subjects must live within a 50-mile radius of our research program and have reliable transportation.
- Subjects must consent to remain abstinent from all drugs of abuse (except nicotine or alcohol) for 24 hours immediately prior to the GCRC admission.
- Subjects must consent to random assignment to the DCS vs. placebo conditions.
Who cannot join
- Women who are pregnant, nursing or of childbearing potential and not practicing an effective means of birth control.
- Subjects with evidence of or a history of significant hematological, endocrine, cardiovascular, pulmonary, renal, gastrointestinal, or neurological disease including diabetes, as these conditions may affect heart rate or skin conductance measurement.
- Individuals with creatinine clearance of 1.2 or greater as DCS is renally excreted.
- Subjects with a history of or current psychotic disorder, current major depressive disorder, bipolar affective disorder or a severe anxiety disorder as these may impact cue reactivity.
- Subjects who are unwilling or unable to maintain abstinent from alcohol and other drugs of abuse (except nicotine) for 24 hours days prior to the cue procedure.
- Subjects meeting DSM-IV criteria for substance dependence (other than nicotine or cocaine as appropriate) within the past 60 days.
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- Subjects currently taking B-blockers, anti-arrythmic agents, psychostimulants or any other agents known to interfere with heart rate and skin conductance monitoring.
- Known or suspected hypersensitivity to DCS.
- Individuals taking medications that could adversely interact with study medications, including, but not limited to ethionamide, isoniazid, or amino acid supplements.
- Subjects with a history of epilepsy or seizure disorder.
- Subjects with significant liver impairment as DCS may increase serum transaminases.
Trial locations and contacts
1 site in 1 country.
United States1 site
Medical University of South Carolina
Charleston, South Carolina, 29425
About this study
In summary, this pilot study will explore the use of an innovative pharmacologic approach to the treatment of substance dependence through the facilitation of extinction of response to cocaine-conditioned cues in cocaine-dependent individuals. If DCS proves successful in this preliminary study, a controlled treatment trial will be planned. This novel approach could have implications for the treatment of multiple substance use disorders including methamphetamine, marijuana and opiate dependence.
Read the detailed description
Cocaine dependence remains a serious problem in the US today and in spite of two decades of intense research, efficacious pharmacotherapeutic treatments have not been identified. Cocaine-associated environmental cues can elicit drug craving and exposure to cocaine-related cues is likely to be involved in relapse. Emerging data supports the role of glutamate in extinction of associative learning in animal models of rear-conditioning and clinical studies of exposure treatment for anxiety disorders. A recent study demonstrated DCS acceleration of cocaine-induced conditioned place preference in rats. Exploration of DCS in facilitating extinction of response to drug-related cues in humans is needed. The proposed study will extend these innovative and promising findings from the basic science arena and anxiety disorders field in a proof of concept investigation of DCS facilitation of extinction of response to cocaine-related cues in a human laboratory paradigm.
- Conditions
- Cocaine Use Disorders
- Being tested
- D-cycloserine, Placebo
- Keywords
- substance related disorders
- Medical subject headings
- Substance-Related Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
D-cycloserineDrug
50 mg DCS
PlaceboDrug
Placebo
| Study group | Role | What they receive |
|---|---|---|
| DCS | Experimental | D-Cycloserine 50 mg is a partial glutamate agonist. Participants received DCS prior to cocaine cue exposure sessions. Receives: Drug: D-cycloserine |
| Placebo | Placebo comparator | Saline comparator. Participants received placebo prior to cocaine cue exposure sessions. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Cocaine Craving Scale
Scale assess cocaine craving following cocaine cue exposure after two administrations of DCS. Subjects rate craving on a scale from 0-10 with 0 indicating "Not at all" and 10 indicating "Extremely".
Measured: Immediately following cue exposure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Oct 2008 (estimated)
- Study startSep 2006
- Primary completionJul 2008
- Study completionJul 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Cocaine Use DisordersStudies of the same condition, open and under way.
- More trials run by Medical University of South CarolinaThe 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
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 27 participants (actual)
Sponsor and investigators
- Lead sponsor
- Medical University of South Carolina
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Aimee McRae-Clark, Medical University of South Carolina
- Investigators
- Aimee L McRae, Pharm.D., Principal investigator, Medical University of South Carolina
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00780442
- Sponsor's protocol ID
- HR#16454
- Status last verified
- Jun 2018
- First submitted
- 23 Oct 2008
- Last updated
- 6 Jul 2018
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 6 Jul 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- D-Cycloserine and Cue Exposure in Cocaine-Dependent Individuals
- ClinicalTrials.gov ID
- NCT00780442
- Acronym / sponsor ID
- HR#16454
- Conditions
- Cocaine Use Disorders
- Keywords
- substance related disorders
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 27 participants (actual)
- Lead sponsor
- Medical University of South CarolinaUniversity, hospital or other
- Study start
- Sep 2006
- Primary completion
- Jul 2008 (actual)
- Study completion
- Jul 2008 (actual)
- First posted
- 27 Oct 2008 (estimated)
- Results
- Posted 6 Jul 2018
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In summary, this pilot study will explore the use of an innovative pharmacologic approach to the treatment of substance dependence through the facilitation of extinction of response to cocaine-conditioned cues in cocaine-dependent individuals. If DCS proves successful in this preliminary study, a controlled treatment trial will be planned. This novel approach could have implications for the treatment of multiple substance use disorders including methamphetamine, marijuana and opiate dependence.
Detailed description
Cocaine dependence remains a serious problem in the US today and in spite of two decades of intense research, efficacious pharmacotherapeutic treatments have not been identified. Cocaine-associated environmental cues can elicit drug craving and exposure to cocaine-related cues is likely to be involved in relapse. Emerging data supports the role of glutamate in extinction of associative learning in animal models of rear-conditioning and clinical studies of exposure treatment for anxiety disorders. A recent study demonstrated DCS acceleration of cocaine-induced conditioned place preference in rats. Exploration of DCS in facilitating extinction of response to drug-related cues in humans is needed. The proposed study will extend these innovative and promising findings from the basic science arena and anxiety disorders field in a proof of concept investigation of DCS facilitation of extinction of response to cocaine-related cues in a human laboratory paradigm.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| DCS | Experimental | Drug: D-cycloserineD-Cycloserine 50 mg is a partial glutamate agonist. Participants received DCS prior to cocaine cue exposure sessions. |
| Placebo | Placebo comparator | Drug: PlaceboSaline comparator. Participants received placebo prior to cocaine cue exposure sessions. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Subjects must be able to provide informed consent and function at an intellectual level sufficient to allow accurate completion of all assessment instruments.
- Subjects must meet DSM-IV criteria for current cocaine dependence. Subjects may meet criteria for abuse, but not dependence on any other substance within the past 60 days with the exception of nicotine. Because of the high comorbidity of cocaine and nicotine dependence, excluding nicotine dependence would seriously compromise the feasibility of recruitment. Nicotine use immediately prior to the testing session will be controlled. Alcohol has also been known to affect HPA function, however to enhance recruitment efforts individuals with alcohol dependence or abuse will be included in the study if they do not require medically supervised detoxification.
- Use of one of the following methods of birth control by female subjects: barrier methods (diaphragm or condoms with spermicide or both), surgical sterilization, use of an intra-uterine contraceptive device, or complete abstinence from sexual intercourse.
- Subjects must live within a 50-mile radius of our research program and have reliable transportation.
- Subjects must consent to remain abstinent from all drugs of abuse (except nicotine or alcohol) for 24 hours immediately prior to the GCRC admission.
Key exclusion criteria (11 listed)
- Women who are pregnant, nursing or of childbearing potential and not practicing an effective means of birth control.
- Subjects with evidence of or a history of significant hematological, endocrine, cardiovascular, pulmonary, renal, gastrointestinal, or neurological disease including diabetes, as these conditions may affect heart rate or skin conductance measurement.
- Individuals with creatinine clearance of 1.2 or greater as DCS is renally excreted.
- Subjects with a history of or current psychotic disorder, current major depressive disorder, bipolar affective disorder or a severe anxiety disorder as these may impact cue reactivity.
- Subjects who are unwilling or unable to maintain abstinent from alcohol and other drugs of abuse (except nicotine) for 24 hours days prior to the cue procedure.
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 |
|---|---|---|
| D-cycloserine50 mg DCS | Drug | DCS |
| PlaceboPlacebo | Drug | Placebo |
Primary outcome
Cocaine Craving Scale
Time frame: Immediately following cue exposure
Scale assess cocaine craving following cocaine cue exposure after two administrations of DCS. Subjects rate craving on a scale from 0-10 with 0 indicating "Not at all" and 10 indicating "Extremely".
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Jul 2018.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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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.
Aimee L McRae, Pharm.D. principal investigator
Medical University of South Carolina
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 D-cycloserine in people with Cocaine Use Disorders, run by Medical University of South Carolina at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Jul 2018. 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. Some participants in this study may receive a placebo. 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?
Yes. Results are posted in the registry (first posted 6 Jul 2018). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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.
What does the primary outcome measure?
Cocaine Craving Scale (time frame: Immediately following cue exposure). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 6 Jul 2018.