Active clinical trials for "Cocaine-Related Disorders"

The study is investigating the impact of progesterone and estrogen on brain areas that are involved with stress response and drug craving. The study will involve 40 women who will participate in the Montreal Imaging Stress Task (MIST) while undergoing fMRI scanning procedures. Half of the women will complete the procedures during the luteal phase of the menstrual cycle; the other half will complete procedures during the follicular phase. Subjective and physiological measures (cortisol levels) will be used to measure stress and craving response. Hypothesis 1A is that all women will exhibit increased craving, stress response, salivary cortisol and BNST and limbic nuclei activation in response to the MIST task. Hypothesis 1B is that these increased responses will be higher for women in the luteal phase than for women in the follicular phase of the menstrual cycle.

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 study will determine the initial efficacy, safety and tolerability of n-acetylcysteine as a pharmacotherapy for cocaine dependence. A rigorous, inpatient human laboratory study will be conducted in which the subjective, physiological and reinforcing effects of cocaine are evaluated during maintenance on placebo and n-acetylcysteine.

Cocaine-use disorders continue to be a significant public health concern, yet no effective medications have been identified. The goal of this study is to establish a research platform for the development of medications for treatment of cocaine abuse and dependence. This study will incorporate self-administration procedures and a non-drug alternative reinforcer, which is hypothesized to reduce the reinforcing effects of cocaine.

A total of 120 male and female opioid dependent cocaine users will participate in this study. This study will be a 8-week double-blind, placebo controlled study examining the dose-dependent effects of carvedilol (up to 50 mg/day) in methadone stabilized patients. The design will have two phases: 1) a four-week "treatment " phase; and 2) a 4 week " taper and detoxification or transfer" phase. Subjects will be cocaine users who are on stable doses of methadone (60 to 140 mg/day). Carvedilol dose will be increased from 12.5mg/day to the target dose of either 25 or 50 mg/day as tolerated. At the end of the treatment-phase, subjects will undergo detoxification from methadone over a 2 to 4-week period based on an individual's needs, and they will concurrently be tapered off carvedilol.

A 12-week, randomized, double-blind, parallel-group, placebo-controlled trial of citicoline as an add-on therapy will be conducted in 200 outpatients with bipolar I disorder and cocaine dependence. Patients will complete mood and memory assessments weekly, in addition to completing self-report measures for cocaine (and other substances, like alcohol) use and craving. Participants will receive manual-driven Cognitive Behavioral Therapy (CBT: two sessions each week for 4 weeks followed by weekly sessions, total 16 sessions) specifically designed for persons with bipolar 1 disorder and substance abuse, and provided by a therapist with experience in CBT. The sessions may be videotaped for training purposes and may be viewed by the researchers, the therapist, and Dr. Schmitz, a clinical researcher at the University of Texas Houston who is the developer of the CBT for bipolar disorder and substance dependence used in the study. Before being videotaped, the patient will sign an "Authorization for Audio Recordings, Photography, or Other Images for Non-Treatment Purposes" to further understand how the videotape will be used, and by whom. The patient will be given the option to review their videotape to view their therapy session. Once the patient has completed all study procedures, or had discontinued the study, the tape will be destroyed, until then the tape will kept in the patient's confidential study file. Further, patients will return to the clinic three times a week for urine drug tests (UDS). 200 patients are expected to be consented for this study and all study procedures will take place at the clinic on the University of Texas Southwestern Medical Center campus. All non-study medications are not part of the study. Non-study medication will be verbally self-reported by the patient at the time of enrollment into the study. The patient will be responsible for the costs of their non-study related medications. The patient will manage their non-study medications with their personal doctor, including any changes in these medications. However the protocol has concomitant medication algorithm in the event that a change in the medication schedule needs to be made by a study doctor. If a study doctor requests a laboratory test for the patient, it will be paid for by the clinic. Otherwise, the patient will be responsible for all costs (including laboratories) associated with their non-study medications.

This study aims at testing for the impact of glutamatergic changes on drug craving in cocaine addiction, and to evaluate the effects of n-acetylcysteine (n-AC) on both glutamate homeostasis and craving using a randomized, double-blind, placebo controlled cross-over design.

The investigators plan to explore the effects of acute pre-treatment with the glucagon like peptide-1 (GLP-1) agonist, exenatide versus placebo, on the subjective (e.g., euphoric) and behavioral effects (e.g., self-administration) of cocaine in experienced, non-treatment seeking users of the drug. Additionally, the investigators plan to explore the effects of sub-chronic (5-day) treatment with exenatide as compared to placebo on the subjective (e.g., euphoric) and behavioral (self-administration) effects of cocaine in experienced, non-treatment seeking users of the drug.

Chronic cocaine use may produce disruption of neurotransmitter functions (including dopamine). This may in turn contribute to measurable dysfunction in important cognitive and behavioral processes. Stimulants that enhance dopamine (DA) function may help in treating cocaine dependence and improving behavioral function -- supporting the notion that these processes are related. An important step is to understand the subjective, physiological, and behavioral effects of potential medications for cocaine dependence. DA-modulating drugs may be targets for pharmacotherapy for substance dependence, and particularly for stimulant drugs like cocaine, which disrupt normal DA function. Buspirone is currently the only available dopamine subtype 3 (DA3) approved for human administration, and is thus a viable investigational compound. This project proposes to evaluate the DA-modulating effects of buspirone on behavioral deficiencies related to DA depletion. Accordingly, the project aims to characterize the effects of buspirone in individuals with cocaine dependence. Employing a daily dosing designs within an acute stimulant challenge (methylphenidate), the experiment will characterize the subjective effects, cardiovascular effects, and behavioral effects (attentional bias to drug cues and risky decision making). The primary hypotheses are that buspirone will attenuate the increases in subjective drug effects ("stimulated", "like drug") and behavioral effects (increases in attentional bias and risky decision making) that are produced by acute methylphenidate administration.

An inpatient safety study to characterize the cardiovascular and behavioral effects of cocaine administration in the presence of LCE. The proposed study involves an inpatient stay of 12 days during which participants will have two cocaine-administration sessions, each including five doses of smoked cocaine with ascending doses.