View clinical trials related to Marijuana Abuse.
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.
Safety of Nabilone in reducing marijuana craving
The purpose of this study is to see if Lofexidine in combination with Marinol is superior to placebo in achieving abstinence, reducing cannabis use and reducing withdrawal in cannabis-dependent patients seeking treatment for their marijuana use.
This study is investigating how N-Acetylcysteine (NAC), an over-the-counter medication, will reduce marijuana use when combined with Contingency Management, a behavioral treatment. It is hypothesized that marijuana dependent adolescents who are treated with NAC will use less marijuana during treatment when compared to adolescents who receive a placebo.
This is a clinical study to evaluate the efficacy of the medication gabapentin in treating persons with cannabis dependence.
Marijuana is the most commonly used illicit drug in the United States. However, the treatment options for cannabis dependence are limited; notably, no effective pharmacotherapy has been developed. Conceptually, the ideal medication treatment for cannabis dependence would: 1. be safe when administered to patients actively using cannabis 2. reduce cannabis intake and promote abstinence 3. treat the symptoms of cannabis withdrawal 4. reduce craving and relapse risk 5. have a low abuse liability.
The first aim of this study is to determine whether a brain reward center (BRC) deficiency in patients with schizophrenia (SCZ) and cannabis use disorder (CUD) will be normalized when patients are given cannabis or dronabinol. The second aim will serve to further assess the effects of dronabinol on symptoms and medication side effects in this population.
This study is designed to investigate the associations among marijuana's discriminative stimulus, reinforcing, subjective (e.g. craving) and physiological effects, and to assess the relative ability of oral THC to block these effects.
Heavy marijuana users report experiencing trouble sleeping when they try to quit, but this has not been carefully studied. This research is being done to learn more about sleep function in heavy marijuana users, and to determine whether a medication approved for treating insomnia can help restore normal sleep function during brief periods of abstinence.
A subset of heavy marijuana users have trouble quitting marijuana use and the number of those seeking treatment for problems related to marijuana is increasing. The purpose of this research study is to investigate whether dronabinol can reduce withdrawal effects associated with stopping marijuana use, if dronabinol can reduce the rewarding effects of smoked marijuana, and whether there are any cognitive performance deficits associated with dronabinol doses that produce such effects.