Active clinical trials for "Tobacco Use Disorder"

The purpose of the study is to compare two different dosage forms from which nicotine is released and absorbed into the bloodstream.

The purpose of this study is to assess the bioequivalence between two new oral nicotine replacement therapy products and Nicorette® microtab.

The objective of this study is to investigate the relative contributions of nicotine replacement and sensorimotor replacement (i.e., smoking denicotinized cigarettes) on abstinence-induced smoking urges, withdrawal-related negative affect, psychiatric symptoms, cognitive task performance and 90-min ad libitum usual-brand smoking behavior in smokers with schizophrenia and non-psychiatric smokers.

Study to determine the safety and effectiveness of silver salt in Ariva® Silver Wintergreen Lozenge on discouraging smoking, by its imparting an unfavorable taste to the smoker when tobacco is smoked.

Background: Smoking is the leading cause of preventable death in the United States, and researchers are interested in gaining a better understanding of the perceived beneficial effects of nicotine to help improve treatment strategies for nicotine dependence. Understanding the conditions under which nicotine improves attention and cognitive processing may provide more useful information for this research. The ability to pay attention and filter relevant from irrelevant stimuli is central to all aspects of information-processing. Top-down and bottom-up attentional processes illustrate how the brain combines stimuli and goal-directed behaviors. Bottom-up processing is an unconscious response to sensory input; for instance, when the eyes automatically focus on a prominent image in a picture. Top-down processing is a conscious response to drive attention toward specific stimuli; for instance, when a person is asked to focus on a less immediately noticeable image in a picture. Researchers are interested in determining whether nicotine improves cognitive performance by acting on top-down or bottom-up attentional mechanisms. Objectives: - To investigate the effect of nicotine on the top-down and bottom-up mechanisms of attention in cigarette smokers. Eligibility: - Current smokers (at least 10 cigarettes per day for at least 1 year) between 18 and 55 years of age. Design: This study will involve one training session and four experimental sessions. During the training session, participants will receive a sample dose of the nicotine nasal spray used in the study to determine if they can tolerate the effects. For each experimental session, participants will receive one dose of nicotine nasal spray (1 mg, 2 mg, or 3 mg) or placebo spray, followed by blood pressure and heart rate monitoring, performance of an attentional test, and questionnaires to rate participants perception of nicotine effectiveness. Participants may receive different doses at different sessions, and will not be told which dose they will receive at any given point.

In the present study, we investigate healthy subjects and schizophrenic patients who frequently show very low attentional capacity with functional magnetic resonance imaging (fMRI) and electrophysiology (EEG) during attention-requiring tasks to assess the level of attentional network activity.

Airway dendritic cells control pulmonary immune responses to inhaled particles. It is the aim of the present study to investigate the acute effects of smoking on the number and surface molecule expression of human airway dendritic cells.

Cigarette smoking decreases life expectancy, causes devastating health complications, and costs society billions of dollars each year. These untoward consequences are especially pronounced among persons with schizophrenia (SCZ) because approximately 80% to 95% of this group smokes cigarettes. These high prevalence rates underscore the need for research investigating the determinants of smoking in patients with SCZ. Several researchers have observed that nicotine improves specific symptoms of SCZ including negative symptoms, negative affect, and cognitive deficits. This has led to the hypothesis that patients with SCZ smoke in an attempt to self-medicate. However, the mechanism(s) by which nicotine has its positive effect on symptoms remains unclear. The current proposal posits that neural inhibition (NI) is a physiological mechanism of this effect, while variation in the alpha-7-nicotinic receptor subunit gene (CHRNA7) represents the genetic underpinnings of these processes. The proposed study will assess NI and symptom improvement after acute administration of nicotine to both smokers and nonsmokers with SCZ. In addition, NI and CHRNA7 variation will be tested as predictors of patients' ability to reduce/quit smoking following smoking treatment. These data may lead to the development of new pharmacological strategies for treating the symptoms of SCZ and new methods for assisting these patients to quit smoking.

The study is designed to test the hypotheses that financial incentives can increase both participation in smoking cessation treatment and resulting cessation rates, when they are offered to BadgerCare Plus (Medicaid) smokers as part of their health care.

Despite an overall reduction in US smoking rates from >50% in the 1960s to about 20% by 2000, the rate of smoking among persons with a serious mental illness (SMI) remains 2-3 times greater than in the general population. Further, even the recent small decline in smoking rates that has been reported in the general population in the past decade has not occurred among smokers with an SMI. In fact, 44% of all the cigarettes consumed in the US are by individuals with a psychiatric disorder and the primary cause of death among Americans with an SMI is a tobacco-related disease. This cluster randomized trial will be conducted in 14 Philadelphia community mental health clinics (CMHCs). Clinics will be randomized to either Addressing Tobacco Through Organizational Change model (ATTOC) or Usual Care (UC) treatment groups. The investigators hypothesize that 1) at the end of the intervention and at a 3-month follow-up, rates of adherence to guidelines for treating TUD will be greater among clinic personnel that receive the ATTOC intervention vs. clinic personnel in usual care; 2) at the end of the intervention and at a 3-month follow-up, rates of client smoking cessation will be significantly greater in clinics that receive the ATTOC intervention than among clients treated with usual care; and 3) using non-inferiority testing, at the end of the intervention and at a 3-month follow-up, there will be no significant degradation in mental health functioning or QOL among clients who receive care at clinics that received the ATTOC intervention than among clients treated with usual care.