View clinical trials related to Cocaine-Related Disorders.
Filter by:Background: - Several studies of risk perception have demonstrated a common bias known as unrealistic optimism, in which individuals feel they are less likely than other people to experience unpleasant or harmful events in their lives, but more likely to experience pleasant or beneficial events. - Previous research has indicated that individuals with schizophrenia have less of a sense of unrealistic optimism about adverse events than individuals without schizophrenia. However, research on risk perception in schizophrenia is sparse, primarily reporting on behaviors and decisions in the laboratory that likely are influenced by risk perception. - Risk perception among substance users may be viewed in two separate categories: perception of vulnerability to adverse events and perception of vulnerability to negative outcomes associated with substance use. Research in both areas has yielded mixed results. Researchers are interested in studying the connections among schizophrenia, addiction, and risk perception in order to develop better drug use prevention and treatment programs for people with and without schizophrenia. Objectives: - To compare unrealistic optimism bias in people with and without schizophrenia and/or drug dependence, and its association with actual risky behavior. Eligibility: - Individuals between 18 and 64 years of age who fall into one of the following study categories: - diagnoses of both drug dependence (marijuana or cocaine) and schizophrenia/schizoaffective disorder - diagnosis of drug dependence only (marijuana or cocaine) - diagnosis of schizophrenia/schizoaffective disorder only - healthy volunteers with no history of drug use or serious mental disorder Design: - The study will require a single visit to the research center for a 5- to 6-hour session. - Participants will complete questionnaires on medical and behavioral history, complete tests of thinking skills like memory and attention, complete a brief computerized decision-making task, and answer questions about risk perception. - Participants will also provide urine samples and breath carbon monoxide measurements to test for recent use of tobacco and other substances.
The purpose of this study is to determine the safety and effects of rivastigmine and huperzine A (HupA), potential treatments for cocaine abuse, when used before experimental administration of cocaine, on a number of physical and psychological measures.
The Screening Protocol is a system devised to evaluate potential research participants for National Institute on Drug Abuse/Maryland Psychiatric Research Center (NIDA/MPRC) studies.
The purpose of this study is to evaluate whether men and women respond differently to seeing items related to cocaine use or to remembering stressful events. Four groups of individuals will be recruited to participate in this study: men with cocaine dependence, women with cocaine dependence, men without cocaine dependence, and women without cocaine dependence. Hypothesis #1: Cocaine-dependent women will demonstrate smaller increases in neuroendocrine, but greater increases in heart rate and more cocaine craving and subjective distress when exposed to stress as compared to cocaine-dependent men and non cocaine-dependent men and women. Hypothesis #2: Cocaine-dependent men will demonstrate greater increases in neuroendocrine, but greater increases in heart rate and more cocaine craving and subjective distress when exposed to cocaine-related cues as compared to cocaine-dependent women and non cocaine-dependent men and women. Hypothesis #3: Cocaine-dependent women will demonstrate greater increases in heart rate and more cocaine craving and subjective distress when exposed to stress inducing stimuli as compared to their own responses to a cocaine-related cue. Hypothesis #4: The neuroendocrine response to a stress hormone (corticotropin releasing hormone; CRH) will be greater in cocaine-dependent women as compared to cocaine-dependent men.
The purpose of this study is to test the efficacy of a newly developed active vaccine against cocaine (TA-CD).
Clinical data demonstrate that a cocaine vaccine (TA-CD: Celtic Pharmaceutical) produces selective anti-cocaine antibodies, yet the impact of these antibodies on cocaine's direct effects is unknown. The objective of this human laboratory study was to measure the relationship between antibody titers and the effects of smoked cocaine on ratings of intoxication, craving and cardiovascular effects. Cocaine-dependent volunteers not seeking drug treatment spend 2 nights per week for 13 weeks inpatient where the effects of cocaine (0, 25, 50 mg) are determined prior to vaccination and at weekly intervals thereafter. Vaccinations occur at weeks 1, 3, 5 and 9.
This protocol is a 2-group double-blind placebo-controlled outpatient study investigating lisdexamfetamine for treatment of cocaine dependence. The investigators plan to enroll 100 subjects in a 14-week trial. The primary objectives will determine changes in cocaine use and secondary objectives will be cocaine craving and impulsivity.
Objective: Cocaine addiction continues to be an important public health problem with over 1.7 million users in the US alone. Cocaine addiction is characterized by compulsive drug use despite adverse consequences and high rates of relapse during periods of abstinence. Cocaine addiction may be mediated by neuroadaptations in reward-related learning and memory processes in the mesocorticolimbic dopamine system and glutamatergic corticolimbic circuitry. Metabotropic glutamate subtype 5 receptors (mGluR5) likely play essential roles in mediating some of the actions of drugs of abuse. Animal studies have shown that mGluR5 knock-out or blockade reduces self-administration of cocaine and cocaine-induced hyper-locomotion. However, to what extent mGluR5 are involved in the pathophysiology of cocaine addiction in humans is currently unknown, partly due to the lack of suitable methods to reliably quantify mGluR5 in the living human brain. This protocol aims to determine whether the density of mGluR5 in brain is altered in participants with cocaine addiction compared to healthy controls using positron emission tomography (PET) and the recently developed radiotracer for mGluR5, [18F]SP203. We also aim to determine whether this density is related to genotype, history of cocaine use, and/or craving for cocaine. Study Population: The study populations will consist of healthy adults with no history of substance abuse and a matched group of healthy current primary cocaine dependent male and female participants (20-50 years old.; N=40/group). Design: Density of mGluR5 will be measured in cocaine dependent participants and healthy adults volunteers with PET and (18F)SP203, a radioligand with specificity for mGluR5. All participants will undergo genotyping to identify normal or variant mGluR5 gene associated with drug abuse. The intensity of craving for cocaine will be assessed while watching a video about cocaine use. Outcome measures: Density of mGluR5 will be compared between cocaine dependent participants and healthy controls. In addition, correlation among the genetic polymorphism, the craving response, and the density of mGluR5 will be determined.
This research deals with behaviors that are part of drug dependence. The purpose is to study how certain factors, including money, the amount of drug available, and the amount of work effort, affect cocaine drug choice. Specifically, we will examine the effects of two issues/factors. The first is how hard individuals are willing to work to obtain a drug; the second is how much drug would individuals choose instead of money, when the amount of probability of money is predictable or unpredictable.
To compare the efficacy of Community Reinforcement Approach (CRA) and 12-Step Facilitation (TSF) counseling and of voucher based reward therapy (VBRT) and a yoked, non-contingent voucher control (VC) for the treatment of cocaine dependent pregnant women or women with young children.