Active clinical trials for "Cocaine-Related Disorders"

Background: Relapse to drug abuse is thought to result, in many cases, from exposure to cues that trigger drug-related memories or emotional associations for example, the association between the sight of a crack pipe and a set of responses such as rapid heartbeat and desire for cocaine. This type of memory is reconsolidated (actively re-stored) each time it is reactivated; however, the reconsolidation process can be disrupted by the drug propranolol, which weakens the link between that memory and an emotional response. Propranolol is traditionally used to treat high blood pressure and other heart-related conditions. Researchers are interested in studying whether propranolol disrupts reconsolidation of drug-cued memories in individuals who are addicted to cocaine. Objectives: - To examine whether propranolol can interfere with reconsolidation of cocaine-related memories and reduce cravings and drug use in substance abusers. Eligibility: - Individuals between 18 and 55 years of age who are current cocaine users enrolled in a methadone treatment program. Design: The study will involve four long sessions (visits 1, 4, 6, and 14) and 10 short sessions. The short visits will be for monitoring of participants use of drugs and alcohol; the longer visits will involve more tests and lab sessions. Participants will be randomized to either the propranolol or placebo group. The long sessions will involve the following procedures: An interview session to develop a personalized drug script/cue set. A two-hour intervention session with baseline measures, drug administration (propranolol or placebo), and two script-guided imagery sets. This is the only administration of propranolol during the study. Two follow-up test sessions, 1 and 5 weeks after the intervention session. Participants will make brief visits to our outpatient clinic for twice-weekly monitoring of ongoing drug use via urine screens and self-report, starting 1 week before the intervention session and ending 5 weeks later.

The aim of this study is to assess the efficacy of caffeine compared to placebo as a maintenance treatment for cocaine dependence. Caffeine potentiation with biperiden will be also studied. Ninety patients with snorted/sniffed cocaine dependence will be randomized to receive caffeine (300 - 1200 mg t.i.d.) plus biperidene (8 mg b.i.d.) caffeine (300 - 1200 mg t.i.d.) with placebo or placebo during 10 days in an in-hospital setting.

Studies using positron emission tomography (PET) have been used with great success in demonstrating specific abnormalities in several facets of dopaminergic system function in human populations (Narendran and Martinez 2009). Among the first, most consistent, and broadly replicated of such findings in drug- (including cocaine) dependent individuals has been the reduction in subcortical (striatal) D2/3 receptors as imaged, most commonly, by the reversible, non-selective, D2/3 receptor antagonist radiotracer, [11C]raclopride. Certain dissociations on D2/3 availability by radioligand ([11C]raclopride vs. [11C]PHNO) and by brain region (striatum vs. SN; terminal vs. somatodendritic, respectively) are poorly understood in relationship to prior antagonist tracer results. In the current study the investigators will use pharmacological interventions (AMPT and methylphenidate) with both antagonist and agonist radiotracers to experimentally reconcile these discordant findings and clarify potential mechanistic inter-relationships.

Even in the absence of a preliminary diagnosis of Attention Deficit Hyperactivity Disorder, symptoms of attention deficit, hyperactivity and cognitive impairment are common in cocaine addicts. Several factors indicate that repetitive transcranial magnetic stimulation might be a strategy to aid in the treatment of symptoms of attention deficit hyperactivity disorder and cognitive function in cocaine addicts. However, up to current days there have been no studies evaluating the effects of Repetitive Transcranial Magnetic Stimulation (rTMS) on neurocognitive performance of individuals suffering from the ADHD.

The purpose of this study is to assess the potential interactions between intravenous (IV) cocaine and tolcapone.

The purpose of this study is to evaluate clinical safety issues pertaining to risperidone, to cocaine and to its interaction, and to determine how pretreatment with risperidone modifies the subjective as well as physiological effects of cocaine.

The purpose of this study is to assess Potential Interactions Between iv Cocaine and RPR 102681

The purpose of this study is for the modeling of impaired judgement in cocaine abusers.

The purpose of this study is to assess the development of human laboratory study model of cocaine relapse prevention.

The purpose of this study is to evaluate the Computerized Exercise to Alter Stimulant Approach Responses (CEASAR), a novel stimulant use cessation intervention, for clients currently enrolled in a treatment centre for mental health and addiction. The investigators plan to conduct a randomized, single-blind controlled trial involving inpatients presenting with concurrent disorders to test the impact of this novel computerized intervention. This pilot study will be conducted at the Burnaby Centre for Mental Health and Addiction (BCMHA) in Burnaby, BC, Canada.