Active clinical trials for "Tobacco Use Disorder"

This study aims to assess the feasibility, acceptability, and the potential harm reduction of switching to potentially lower risk, oral nicotine pouches in adult smokers. Part One of this study aims to assess the interest of current smokers in switching to an e-cigarette device (i.e. JUUL) compared to alternative non-combustible tobacco products (i.e. smokeless tobacco/snus) and/or medicinal nicotine via survey. Part Two will consist of a pilot study of 30 non-treatment seeking adult smokers to investigate within-person changes in smoking behavior as a result of switching to different concentrations of oral nicotine pouch products (i.e. ZYN, 3mg and 6mg nicotine concentration). Additionally, by measuring bio-markers of tobacco exposure from baseline, this will allow the study to assess the potential for harm reduction in switching from cigarettes to oral nicotine pouches.

A Randomized Study Comparing Nicotine Pharmacokinetics of Seven Electronic Cigarette Products and One Traditional Cigarette Across Two Delivery (10 puff and ad- libitum) Conditions, in Healthy Adult Smokers

This proposal will obtain preliminary data on the effect of a single sub-anesthetic dose of a sedative on cigarette craving and smoking behavior as well as measuring tolerability and acceptability.

A placebo-controlled study to enroll male and female tobacco smokers who will participate in five experimental sessions. subjects will be given an IV infusion of either saline or 1 mg nicotine at rapid, moderate or slow infusion rates (nicotine at 0.24,0.096, 0.048 and 0.024, mcg per kg body weight per sec).

This is a multi-center randomized controlled trial comparing the effectiveness of community health worker (CHW) vs. usual clinician support in helping chronically-ill patients with low socioeconomic status to improve their health outcomes.

The purpose of this study is to find out how vaccine-induced antibodies change the way the body processes nicotine from cigarettes. These antibodies absorb nicotine and can reduce nicotine levels in the brain. In this way, the vaccination may help to quit smoking. The central hypothesis is that anti-nicotine antibodies change kinetics of brain nicotine accumulation and distribution of nicotine between the brain and other body tissues. This vaccine is investigational which means that it is still being tested in research studies and is not approved by the U.S. Food and Drug Administration (FDA) to help people quit smoking.

The purpose of the study is to learn more about tobacco dependence and nicotine metabolism in African-Americans and whites, by studying to see if how fast a person metabolizes nicotine (how the body breaks down nicotine into inactive compounds) affects how dependent they are on smoking cigarettes. The investigators believe that people with a faster rate of metabolism may have more severe nicotine withdrawal symptoms and also may have a harder time trying to quit smoking.

This study will evaluate effects of treatment with varenicline, a smoking cessation drug, on the dopaminergic system by using Positron Emission Tomography (PET) imaging with new radioligand, [11C]-(+)-PHNO. The investigators primary hypothesis is that chronic varenicline administration will increase dopamine (DA) receptors levels ([11C](+)PHNO) within the human brain.

This study will examine extended exposure to cigarettes varying in nicotine content among disadvantaged women. Adults with affective disorders are at increased risk for smoking, nicotine dependence, and using high nicotine yield cigarettes and are also at significantly increased risk for smoking-related adverse health consequences, including site-specific cancers, heart disease, and premature death. Studies testing an innovative regulatory strategy of reducing the nicotine content of cigarettes to a non-addictive level have shown promising beneficial effects (decreased smoking rate, reduced toxicant exposure, and increased cessation) in the general population of smokers. However, these studies have uniformly excluded vulnerable populations like those with affective disorders who may respond differently considering their greater vulnerability to smoking and nicotine dependence. Thus, little is known scientifically about how this highly vulnerable subgroup of smokers might respond to a nicotine reduction policy. This project is designed to address that substantial knowledge gap. This same study was also conducted in two additional vulnerable populations under a similar protocol.

Cigarette smoking rates are extremely high in persons with schizophrenia and this increases the risk of disease and death due to tobacco-related disorders. One of the features of schizophrenia is reduced cognitive abilities, such as poor attention and memory. It is thought that people with schizophrenia smoke cigarettes to reduce these cognitive problems, as nicotine can improve cognitive function in these people. When people with schizophrenia stop smoking it causes further cognitive difficulties, which makes quitting harder for them compared to people without schizophrenia. A method called repetitive transcranial magnetic stimulation (rTMS) allows clinicians to give repeated magnetic pulses through the scalp to cause changes in brain activity and behaviour. rTMS can improve cognitive function in people with schizophrenia. Studies have also shown that rTMS can reduce tobacco craving and consumption of cigarettes. Therefore, we believe that rTMS will improve the cognitive deficits observed during cigarette smoking abstinence and help reduce cravings for cigarettes. Ultimately, rTMS may help smokers with schizophrenia who can't quit smoking with available treatments. This study will examine the effect of rTMS on tobacco cravings and cognitive problems produced by overnight abstinence from cigarette smoking in persons with schizophrenia in comparison to people without mental illness who smoke. Important information about the potential of rTMS for the treatment of cognitive deficits and tobacco addiction in schizophrenia will be obtained. Providing more effective smoking cessation treatments in people with schizophrenia may lead to improved physical and mental health for these patients, who are extremely susceptible to tobacco addiction and tobacco-related illness.