View clinical trials related to Marijuana Usage.
Filter by:The project proposes to continue the development of an intervention for relapse prevention in the form of a professional quality video game which rewards drug-rejecting physical motions and spoken refusal phrases. Phase I research findings showed that youth in recovery experienced increased low craving levels, strong levels of satisfaction, and interest in attending treatment sessions where the intervention is available - an important outcome since failure to attend treatment is highly correlated with relapse. In Phase II, the investigators propose to modify and expand the prototype based on customer feedback from treatment centers, counselors and patients. The investigators will test the effectiveness of the motion and voice-controlled game in a randomized controlled trial of youths in treatment for opioid use disorder who have access to the game for a month. The investigators will measure the effect of gameplay on successful completion of detoxification/inpatient treatment and rates of linkage to next level of outpatient treatment. The investigators will also measure the effect of gameplay compared to treatment as usual (TAU) during a subsequent episode of outpatient treatment (following inpatient), on rates of treatment attendance, treatment retention, urine drug test results, substance use self-report, treatment alliance, drug craving, and treatment satisfaction.
This is a longitudinal study of the long-term health impact of cannabis smoking on the lungs. Participants will be followed over a period of 3 years, and impacts of cannabis smoking on the lungs will be measured with magnetic resonance imaging (MRI) using hyperpolarized xenon-129 gas, pulmonary function tests, exercise capacity, computed tomography images and questionnaires.
This is a pilot study of the feasibility, acceptability, and effectiveness of a brief, one-session intervention for a diverse sample of 44 young adults who report alcohol binge drinking or marijuana use in the past month. The proposed study will utilize a two-group randomized controlled trial (RCT) design. Participants will be randomized to one of two interventions conditions: 1) Narrative-based Therapeutic Assessment (NbTa) or 2) Health Education (HE) control condition. Participants will be assessed on their 7- and 30-day alcohol and marijuana use at baseline and at 6 month follow-up.
This study will examine the effects of doses of marijuana/placebo and doses of opioid/placebo, alone and in combination. The primary outcomes are related to pharmacodynamic measures (subjective ratings of drug liking and other abuse-related effects; physiological outcomes) to determine the interaction effects of these compounds.
This study will examine the effects of various strains of marijuana on simulated driving performance; the effects of alcohol administration will also be examined to further understand how marijuana-induced driving changes compare to the effects of alcohol. Secondary outcomes will include physiological effects, subjective- and observer-rated outcomes, and psychomotor performance under the various dose conditions.
Alcohol is one of the most widely used intoxicants. The effects of driving while intoxicated are well documented, leading to the laws and regulations behind drunk driving. Marijuana is also a commonly abused drug, whose use is increasing with widespread legalization/decriminalization in many US states and use of medical marijuana. Marijuana use is linked to cognitive impairment and is likely be the cause of intoxication-induced accidents. The effects of marijuana intoxication on driving impairments are less documented than those of alcohol. However, most marijuana users also consume alcohol when smoking cannabis, and preliminary data strongly suggest that driving impairment from both drugs used together is synergistic rather than just additive. This study will aim to investigate the brain and behavior in the same individuals, using a similar design to the current Neuroscience of Marijuana Impaired Driving and the prior Alcohol and Driving Grant, that used similar techniques and measures to quantify drunk automobile driving. We hypothesize that alcohol and marijuana use combined will lead to greater impairment in a simulated driving task, as well as other driving-related cognitive impairments. In a randomized, counterbalanced, double-blind study, we will dose participants with alcohol to a legal level of 0.05% blood alcohol content, then we will administer a moderate inhaled dose of THC marijuana or placebo marijuana, using paced inhalation that employees a vaporizer. Participants will comprise 10 regular alcohol and marijuana consumers aged 21 to 40 years of age; all participants must report smoking marijuana and drinking alcohol together. Of the 10, 5 will be occasional marijuana smokers and 5 frequent marijuana smokers. Following this dosing, we will assess impairment through cognitive testing as well as a simulated driving test through fMRI and neuropsychological tests. Samples of breath, blood and oral fluid will also be collected at multiple time points throughout the study visits to be measured for alcohol and THC concentration and its metabolites. This allows clarification between the relationship of impairment, as well as subjective and objective intoxication, and levels of THC and its metabolites in the users system.