View clinical trials related to Cocaine Dependence.
Filter by:The purpose of this challenge grant is to conduct an initial test of a new, enhanced version of this protocol (telephone monitoring and counseling - enhanced, or TMAC-E), which has been modified to include the elements of our existing continuing care intervention plus patient-centered changes to boost patient involvement and community linkages. The investigators will recruit 150 cocaine dependent patients in publicly funded, community-based programs and randomize them to treatment as usual or the TMAC-E and follow them for 12 months.
This protocol (a supplement to 805466) is to test whether our telephone continuing care model can be implemented successfully by "real world" publicly funded programs. Participants will be recruited from Philadelphia's Department of Behavioral Health - run drug programs. The investigators will train city telephone care managers to deliver our telephone continuing care intervention to patients in this program. The investigators will randomize 200 to receive this intervention or usual care and follow them for 12 months.
This is a Phase II within-subjects double-blind placebo-controlled human laboratory study. The purpose of the study is to determine the efficacy of varenicline (Chantix) for reducing cue-induced cocaine and alcohol craving.
Doxazosin, an alpha 1-adrenergic receptor antagonist, may play an important role in cocaine addiction in humans. This study will evaluate to what extent the prospective screening for catecholamine related polymorphisms for alpha 1 NE receptor/transporter, COMT and DBH as main targets predict the treatment efficacy of doxazosin for cocaine-using behavior.
This is a residential pilot trial to evaluate the pharmacodynamic interaction between zonisamide and cocaine, with the goal of evaluating zonisamide's potential for the treatment of cocaine dependence.
This research will evaluate the impact of blocking central and peripheral glucocorticoid receptors on stress sensitivity and the risk of relapse to cocaine use in treatment-seeking cocaine-dependent individuals. Mifepristone (RU-486) will be the glucocorticoid antagonist used.
The primary objective of this study is to evaluate the impact of substance-abuse treatment as usual plus smoking-cessation treatment (TAU+SCT), relative to substance-abuse treatment as usual (TAU), on drug-abuse outcomes. Specifically, this study will evaluate whether concurrent smoking-cessation treatment improves, worsens, or has no effect on stimulant-use outcomes in smokers who are in outpatient substance-abuse treatment for cocaine or methamphetamine dependence.
The purpose of the study is to asses the potential interactions between intravenous cocaine and doxazosin in cocaine dependent volunteers who are not seeking treatment. The study will evaluate the effects of doxazosin on the cardiovascular and subjective effects of cocaine in a human laboratory study.
Background: - People who are in treatment for substance abuse often feel distress during the withdrawal period and afterward. Some individuals feel distress more acutely than others, and this distress has been linked to poor treatment outcomes and increased risk of relapse in smokers, alcoholics, and cocaine- and heroin-dependent individuals. More research is needed on the effects of distress on the brain, particularly in individuals who are seeking treatment for substance abuse. Researchers are interested in using functional magnetic resonance imaging (fMRI) scanning to study distress tolerance in both substance users seeking treatment and healthy non-drug-using volunteers. Objectives: - To use functional magnetic resonance imaging to study the effectiveness of a distress tolerance assessment. Eligibility: - Individuals between 18 and 50 years of age who are either cocaine dependent or healthy non-drug-using volunteers. Design: - This study involves an initial screening visit and a scanning visit, with four followup visits. - Participants will be screened with a medical history and physical examination, as well as blood samples and questionnaires about mood and past and current drug use. - Participants will have a structural MRI scan of the brain to provide a baseline reading for comparison. Participants will then have an fMRI scanning session, which will include both the distress tolerance assessment and relevant control tasks. Heart rate, blood pressure, and other physical reactions will be monitored throughout the scan. Participants will also provide blood and saliva samples to measure stress hormone levels. - Participants will be eligible to have followup assessments with fMRI scanning 1, 3, 6, and 12 months after the scanning visit.
Background: - Cues related to past drug use induce a particular pattern of brain activation, which has been correlated with craving for cocaine in active cocaine abusers. Researchers are interested in determining the role of the brain chemical dopamine in cue-elicited as well as spontaneous craving for cocaine. - To study the role of dopamine in cocaine craving, researchers will use positron emission tomography (PET) to compare the neural reactions of cocaine users with those of non-substance-abusing healthy volunteers. Researchers hope that the data gathered from this study will lead to the development of more effective anti-craving medications. Objectives: - To clarify the role of dopamine in cue-elicited responses that contribute to cocaine abuse. - To determine if PET results of this study differ with various means of administering PET chemicals. Eligibility: - Individuals 21 to 44 years of age who are either current cocaine users (at least twice per week) or healthy volunteers without a history of drug abuse. Design: - Cocaine-using participants will enter the inpatient clinical research ward at the National Institute on Drug Abuse (NIDA) Addiction Research Center for 2 nights before the day of the study. In addition, these participants will stay overnight at NIDA the evening after each PET session and will be discharged the following day. Cocaine-using participants will be required to perform a balance test before the study to provide a baseline response in case they require anti-anxiety medications to cope with the effects of the study. - Control subjects will not be required to stay overnight and will arrive as outpatients for the PET session. All participants will be required to abstain from alcohol and caffeine consumption from midnight before each study session, and will not be permitted to smoke on the day of testing. - - On the day of the study, participants will undergo a practice session to set up the PET scanning equipment. Following the practice session, participants will be shown video recordings of images that are related to nature (e.g., seashells) or to drug abuse (e.g., drug paraphernalia). Participant reactions will be studied through the PET monitoring, and the study will be conducted in two separate PET sessions with a break in between. Individuals in the cocaine-using group may receive anti-anxiety medication if the stimulus cues increase anxiety related to cocaine craving. - Different groups of participants will receive different methods of PET chemical administration, and researchers will compare these methods.