Active clinical trials for "Tobacco Use Disorder"

The purpose of this study is to conduct a randomized controlled school-based trial to evaluate the effectiveness of a four-session school nurse-delivered smoking cessation intervention in increasing abstinence rates among high school students who smoke.

The investigators hypothesize that varenicline will dose dependently attenuate the subjective effects of cigarettes after a period of abstinence. Also, treatment with varenicline will dose dependently weaken the severity of nicotine withdrawal symptoms. Thirdly, we hypothesize that treatment with varenicline will dose dependently decrease cigarette self-administration in the model proposed.

Cigarette smoking is of great public health importance and is the single most important preventable cause of morbidity, mortality and excess health care costs in the United States. After a steady decline for the last 50 years, the prevalence of tobacco use in the United States has reached a plateau of approximately 21%. Currently available treatments among adults are not efficacious for all tobacco users. New pharmacologic agents thus need to be continually developed and tested. The release of dopamine in the nucleus accumbens is one of the key components of the pleasurable and rewarding effects of nicotine. Drugs that increase monoamine neurotransmitter availability (particularly dopamine and norepinephrine) are likely to increase the reward function and thus ameliorate withdrawal symptoms. S-Adenosyl-L-Methionine (SAMe), the primary methyl donor for the central nervous system (CNS), donates methyl groups towards presynaptic synthesis of CNS monoamine neurotransmitters. By facilitating the synthesis of dopamine and norepinephrine in the brain, SAMe is likely to ameliorate the symptoms of nicotine withdrawal, thus improving tobacco abstinence rates in smokers who are trying to stop smoking. SAMe is well tolerated and is available over-the-counter. To date, no prospective clinical trial evaluating the efficacy of SAMe for the treatment of tobacco dependence has been published. We propose to evaluate the efficacy of SAMe for increasing smoking abstinence and decreasing nicotine withdrawal symptoms in a randomized, blinded, placebo-controlled, three-arm, parallel-group, dose-ranging phase II clinical trial. Participants (N=120) will be randomly assigned to one of the three groups, and will receive an 8-week course of SAMe 800-mg per day, 1600-mg per day, or a matching placebo. This study is anticipated to provide the data needed to develop a larger randomized controlled clinical trial submitted through the R01 funding mechanism, if the results appear promising.

The study's major aim is to investigate the ability of a commercial Electronic Nicotine Delivery Device (ENDD) to induce long-term smoking reduction/abstinence in smokers unwilling to quit. Secondary aims are to monitor adverse events and measure participants' perception and acceptance of the product. This pilot study will evaluate smoking reduction/abstinence effects, product preferences, and adverse events of a currently marketed device in Italy ("Categoria" electronic cigarette - "ORIGINAL" 7.2 mg nicotine cartridges). The primary hypothesis is that the E-Cigarette is a safe device that allows smoking reduction or abstinence in smokers.

The purpose of this study is to determine whether Cue Extinction Training will reduce relapse rates in cigarette smokers using the patch to quit.

This randomized trial will evaluate whether varenicline directly observed therapy provided at a methadone clinic is more efficacious than self-administered varenicline for promoting smoking cessation and enhancing adherence.

The goals of this within-subject pilot study are: (1) assess the feasibility and safety of administering the Catechol-O-Methyl-Transferase (COMT) inhibitor, tolcapone, to smokers, and (2) explore whether tolcapone may reduce abstinence-induced cognitive and affective symptoms that promote relapse. A secondary exploratory goal is to assess whether these effects may be more pronounced in smokers who carry a high risk COMT genotype for smoking relapse: COMT val/val.

Nicotine addiction is a serious health problem in the United States; 46 million people smoke cigarettes, and 70% of those are trying to quit. The nicotine patch and bupropion, a medication used to reduce nicotine cravings, are two commonly used smoking cessation aids. Both have been shown to reduce smoking rates, however, the effectiveness of combining the two treatments has not been widely examined. This study will evaluate the effectiveness of the nicotine patch combined with bupropion at reducing smoking rates among younger, low-income, and minority individuals.

The information gathered in this study may help to develop more effective ways to help people quit smoking and stay quit in the future.

The purpose of this study is to 1) evaluate the safety and efficacy of two doses of bupropion SR (150mg/day and 300mg/day) when compared to placebo, as an aid to smoking cessation in adolescents and 2) to examine which factors, such as medication adherence, nicotine dependence, and motivation to quit, affect treatment outcome.