View clinical trials related to Cocaine Dependence.
Filter by:Repeated drug consumption may progress to problematic use by triggering neuroplastic adaptations that attenuate sensitivity to natural rewards while increasing reactivity to craving and drug cues. Converging evidence suggests that glutamate modulation may work to correct these adaptations and rapidly restore motivation for delayed non-drug rewards relative to immediate drug use. Using an established laboratory model aimed at evaluating behavioral shifts in the salience of cocaine now vs. money later, the investigators will test the effect of CI-581a on cocaine self-administration as compared to the active control.
The main purpose of this study is to determine if it is safe to use the study drug, clavulanic acid, in combination with cocaine. In this study, subjects will receive intravenous (i.v.) cocaine and the study drug, clavulanic acid. The safety of clavulanic acid is being studied so future studies can be done to find out if this drug is helpful in treating cocaine dependence. Currently, there is no available medication treatment for cocaine dependence.
In this study, the investigators seek to evaluate the effects of cannabidiol (CBD) on cocaine craving and relapse. Cocaine addiction is characterized by compulsive substance use and repetitive urges to consume the drug even after a sustained period of abstinence. While substance use remains the most obvious direct outcome of addiction, there is a growing interest in other core symptoms of this disorder. Craving has become a subject of great interest as it is a reliable intermediate phenotype of cocaine relapse and a distressing symptom of addiction associated with suffering. Indeed, even after a period of abstinence, cocaine-dependent individuals remain vulnerable to stress and other craving-inducing stimuli, which, in turn, lead to intense physiological responses and various negative feelings such as anger and sadness. Real-time daily monitoring of craving and drug use has shown that craving predicts cocaine relapse among cocaine-dependent individuals. In sum, working toward improving the treatment of craving could not only help prevent relapse, but also reduce patient distress on emotional, cognitive, and physiological levels. In the past decades, significant scientific efforts have been deployed toward the development of innovative strategies to beat cocaine addiction, but with partial success thus far. Psychosocial approaches have been widely used to help cocaine-dependent patients achieve better outcomes after drug cessation, but literature indicates that these strategies alone are at times insufficient to induce significant behavioural changes or a reduction in rates of drug consumption. Unlike other types of addiction, such as opioid and alcohol, no pharmacological treatment has yet been found to be truly effective in relieving cocaine-cessation symptoms like craving and anxiety or to prevent relapse. CBD is a natural cannabinoid with a favourable tolerability profile and discrete neurobiological actions that are linked to neural circuits closely involved in addiction disorders. Addiction to cocaine is characterized by alternating phases of intoxication and short abstinence, followed by recurrent drug-craving episodes which result in distress and relapse. Our hypothesis is that CBD a cannabinoid known for its broad spectrum properties is an interesting pharmacological contender to decrease cocaine craving and treat cocaine addiction. Previous studies conducted in animals and humans confirm that CBD is a very safe and tolerable medication.
The investigators will assess the impact of treatment with doxazosin and modafinil, alone and in combination, on the subjective and reinforcing effects of cocaine in non-treatment-seeking, cocaine-dependent volunteers. The investigators will use a hybrid design in which participants will be randomized into two groups: placebo and doxazosin 8 mg/d. They will remain in their assigned group for the duration of the study. After titrating doxazosin to the target dose, study procedures will be completed three times, once during treatment with each dose of modafinil (0, 200, and 300 mg/d), in pseudo-random order such that 200 mg precedes 300 mg).
Can brain MRI at entry of cocaine inpatient cessation attempt predict relapse during a three month follow-up ? Hypothesis : White matter losses in the prefrontal cortex are associated with relapse to cocaine use.
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.
This proposal describes a combined laboratory and clinical trial preliminary investigation to advance medication development for cocaine dependence. The main objective is to test whether intranasal Oxytocin could reduce relapse risk by reducing stress sensitivity. To measure the stress sensitivity, this study will evaluate a new stress challenge: a) Intranasal desmopressin, a vasopressin analog, will be used an endocrine stressor; its effects will be evaluated by serial measurements of serum Adrenocorticotropin hormone (ACTH), and self reports; b) if pretreatment with intranasal oxytocin dampens the ACTH and subjective response to intranasal desmopressin. These measures will be tested during a 7-day inpatient abstinence induction hospitalization. For those patients with family and work obligations, an outpatient abstinence induction procedure is available. The response to the desmopressin challenge will be compared to a cohort of matched control subjects. After abstinence induction, cocaine dependent patients enter a 6-week, double blind, randomized, placebo-controlled trial of 24 IU of intranasal oxytocin vs. placebo, to monitor if this reduces the relapse risk.
There has been recent interest in the role of the 5-HT1B receptor as a possible modulating factor in cocaine dependence, certainly in preclinical models. The Yale Positron Emission Tomography (PET) Center has developed a novel 5-HT1B receptor antagonist radioligand, [11C]-P943, which has been validated in human studies. We hypothesize that the 5-HT1B receptor plays a key role in cocaine dependence. The long term goal of this project would be to study pharmacological manipulation of the 5-HT1B receptor as a potential molecular target for 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.
This study is designed to look at the relationship between brain glucose utilization, neurotransmission (e.g., glutamate, also known as the main excitatory amino-acid neurotransmitter in the brain), and synaptic density. This relationship will be explored in the brain's prefrontal cortex, an area important in decision-making and impulsivity.