E-Cig Use

The study is focused on investigating the mechanisms involved in microvascular health in subjects that use e-cigarettes frequently. To explore microvascular health, different techniques and compounds. For one of the tests, iontophoresis, the drug's use will be stored and handled as described by the approved IND and non-IDS plan.

This study evaluates the amount of nicotine, cannabis, and toxicants linked to the use of nicotine e-cigarette and/or cannabis products in the blood and urine of young adult users as well as the cannabis and nicotine use behaviors of consumers.

This between-subjects study aims to evaluate the effect of flavor on initial and sustained switching from combustible cigarettes to e-cigarettes among 210 cigarette smokers. After measuring baseline cigarette smoking rate, participants will be randomized to a six-week regimen of fruit-flavored, tobacco-flavored, or menthol-flavored e-cigarettes and be instructed to switch (versus smoking cigarettes) over a 6-week period. Flavor-associated subjective reward and the reinforcing value of flavored e-cigarettes relative to combustible cigarettes will be assessed as mechanisms.

The goal of this randomized controlled trial is to evaluate a psychosocial school-based hybrid intervention which includes traditional classroom sessions and online e-learning modules to reduce risk of vaping and prescription drug misuse as part of a broader positive youth development substance use prevention model. Upper elementary schools (N=30) will be randomized to either an intervention group that will receive a hybrid intervention or a treatment-as-usual control group that will receive existing health education programming. At the end of the intervention period, and at 6- and 12-month follow-up assessments, both groups will be compared on changes in behaviors, norms, attitudes, and knowledge regarding vaping and prescription medication use. The main questions the trial aims to answer are: * Does the intervention lower risk of vaping and prescription drug misuse? * Does the intervention increase pro-health norms, attitudes, and knowledge regarding vaping and prescription drug misuse? Participants will: * Attend 1 classroom session per week for 6 weeks (lecture, discussion, small group activities, skills practice). * Complete 1 e-learning module per week for 6 weeks (animated didactic content). * Students attending schools randomized to the control group will attend existing health education programming.

The overall purpose of this pilot study is to assess the feasibility and acceptability of an in-person faith-based intervention to help people stop tobacco use. The study will address use of different types of tobacco products, such as smoking combustible cigarettes, cigarillos and little filtered cigars, and using/vaping electronic nicotine delivery systems (vape pens, e-cigs, and JUUL). The intervention consists of 12 weekly meetings in which participants will go through BREATHE Free, a study guide curriculum designed to teach character strengths and promote resilience. This pilot research will provide information and practical lessons on how to improve Breathe Free implementation, increase engagement of the local people, and maximize their benefit. The main questions it aims to answer are: * Do participants find BREATHE Free curriculum acceptable, engaging and helpful to stop tobacco use? * Do participants who complete BREATHE Free curriculum smoke fewer cigarettes per day? Researchers will assign participants to either BREATHE Free curriculum or usual care. Participants will: * Be taught BREATHE Free curriculum or be given information and referral to tobacco quit line * BREATHE Free group will attend 12 group meetings held on the university campus * All participants will answer interview questions related to tobacco use, character strengths and resilience * Expired Carbon Monoxide (CO) will be assessed in all participants.

Over the past 10 years, electronic cigarettes (e-cigarettes, EC) have been commercialized as a "less harmful" alternative to traditional cigarettes.1,2 However, e-cigarettes are believed to cause pulmonary epithelial, endothelial and vascular dysfunction, and to cause murine phenotypes similar to those of human COPD. Recently, "spiked" vape juice has been linked to severe lung damage. Unfortunately, the effects of e-cigarettes on the human lungs are still poorly understood, especially in healthy young adults. Therefore, establishing the health effects of e-cigarettes in humans is of paramount importance to guide medical and regulatory decision making. Its widespread use and immense popularity among teenagers and young adults have caused major concern given potentially significant addictive and detrimental long-term health effects.