View clinical trials related to Nicotine Dependence.
Filter by:The purpose of this study is to determine whether baclofen is effective in reducing smoking urge, withdrawal, and reinforcement in moderate to heavy cigarette smokers.
Tobacco Smoking is the most prevalent addiction in society today causing directly major health hazards and sharing morbidity with other psychiatric disorders. Nicotine binds to acetylcholine receptors and thus elevates DA release and inhibits DA transport. There are few studies using advanced brain imaging techniques to investigate how nicotine releases dopamine in humans. These studies utilized dopamine displacement paradigms with [11C] Raclopride binding to D2 receptor in Positron Emission Tomography (PET). There is evidence that smokers (particularly those who enjoyed smoking) showed decreased [11C] Raclopride binding in the caudate/nucleus accumbens and putamen after smoking cigarettes. These results also indicated that the effects of nicotine on dopaminergic neurotransmission are mediated by pleasure and craving. We propose to investigate the effects of smoking a cigarette ad lib on dopamine release by using dopamine competition paradigm with [I123] IBZM in SPECT. Secondly, we will test the hypothesis that dopamine deficiency is a major vulnerability factor for smoking. This may provide further evidence that dopamine deficiency in some smokers pre-disposes them to enjoy and desire smoking cigarettes more than others.
The purpose of this study is to evaluate the efficacy of the glycine antagonist, GW468816, compared with placebo on duration of abstinence and rates of relapse in recently quit female smokers in a randomized, double-blind, five-week clinical trial. According to the investigators, the new medication, GW468816, is thought to send certain signals in the brain that may be effective in helping people stay abstinent after they have recently quit smoking. GW468816 is a non-nicotine drug. The investigators of this study hypothesize that subjects receiving GW468816 will demonstrate a significantly longer time to relapse to smoking than those in the placebo group, as measured by the primary outcome measure (see below).
The purpose of this study is to assess the safety and feasibility of concurrent treatment of nicotine dependence (cigarette smoking) and acute depression. Participants who meet DSM-IV criteria for both nicotine dependence and acute major depression will be given pharmacological treatment for both disorders at the same time, along with a brief behavioral intervention for smoking cessation.
Since 1996, the nicotine patch has been re-classified from prescription to over-the-counter (OTC) status in the United States. Little is known about how the public uses the OTC nicotine patch due to lack of monitoring. The purpose of this observational study is to describe the characteristics of consumers who purchase OTC nicotine patches from community pharmacies and to determine the factors associated with the appropriate use of nicotine patches.
In this study we, the investigators at the Centre for Addiction and Mental Health, intend to explore whether bupropion is able to reduce smokers' responses to cigarette-related environmental cues, and craving. Previous studies have indicated that bupropion may be able to achieve these outcomes. Therefore, we predict that smokers treated with bupropion for several weeks will show reduced reactivity to cigarette cues and craving.
This study will test a combination of the drugs naltrexone and bupropion with weight-concerned smokers to investigate whether or not this combination of drugs improves smoking cessation quit rates and minimizes post quit weight gain.
The purpose of the study was to determine how the treatments for cigarette craving work. Hypothesis: During exposure to cigarette-related cues, heavy smokers will have greater reductions in regional brain activation from before to after both forms of active treatments than from before to after placebo.
Weight gain after quitting smoking is an important barrier to treatment for many smokers. This study will test a drug called naltrexone with weight-concerned smokers to investigate whether or not this drug both improves smoking cessation quit rates and minimizes post quit weight gain.