A reduced exposure heated tobacco product was introduced then abruptly taken off United States shelves: results from a tobacco harm reduction natural experiment.

Background: A heated tobacco product (HTP) authorized for purchase in the United States by the Food and Drug Administration as a reduced harm product was removed from the market after about 2 years of sales. Adults who used the HTP were surveyed to determine the impact of the introduction and removal of the HTP on past and current tobacco behaviors.

Methods: Adults who were using the HTP before its United States market removal (n = 502) completed a cross-sectional online survey to determine their tobacco use behaviors at three timepoints: prior to HTP initiation, just before HTP market removal, and at the time of the survey which was administered approximately 10 months post-removal.

Characterization of Use Behavior of Nicotine Pouches.

Actual use of nicotine pouch products is not well studied. The objectives of this study were to characterize ® nicotine pouch (Test Products (TP)) use behavior, including association with cigarette and smokeless tobacco (ST) product use. Adults who smoke cigarettes (AS) and/or adults who use ST (ASTU) (N=1147) that were not planning to quit and had expressed interest in trying and using TP after a 5-day trial were offered use of TPs (7 flavors at 5 nicotine levels) for 6 weeks.

Awareness and use of tobacco products among underage individuals: findings from the altria client services underage tobacco use survey 2020-2022.

Background: Tobacco use among underage individuals is a public health concern. Timely data about tobacco products, especially emerging products such as novel oral nicotine products (NPs), can provide critical information for the prevention of underage tobacco use. With a recent federal law raising the legal age of purchase of tobacco products from 18 to 21, it is of interest to benchmark awareness and use of tobacco products in the new underage population, young adults 18-20 years old.

Nicotine pharmacokinetics and subjective responses after using nicotine pouches with different nicotine levels compared to combustible cigarettes and moist smokeless tobacco in adult tobacco users.

Rationale: Oral tobacco-derived nicotine products include on!® nicotine pouches (NPs) which are tobacco-leaf free and available in multiple flavors and nicotine levels. Switching completely to NPs from cigarettes and moist smokeless tobacco (MST) has the potential to reduce harm for adult tobacco consumers. However, the dependence potential of NPs is not established.

Youth susceptibility to tobacco use: is it general or specific?

Background: Susceptibility to tobacco use predicts tobacco use onset among youth. The current study aimed to estimate the extent of overlap in susceptibilities across various tobacco products, investigate sociopsychological correlates with susceptibilities, and examine whether the relationship linking susceptibility with the onset of use is product-specific or is accounted for by a general susceptibility-onset relationship.

Methods: The study population consisted of US youth 12-17 years old who had never used a tobacco product, sampled in the longitudinal Population Assessment of Tobacco and Health study wave 4 (Dec.

Human Abuse Liability Assessment of Tobacco and Nicotine Products: Approaches for Meeting Current Regulatory Recommendations.

Many regulatory bodies now recommend that tobacco product manufacturers provide information regarding new tobacco products' abuse liability to inform regulatory authorization of currently marketed tobacco products or new product applications (including premarket tobacco product applications in the United States). In addition, the US Food and Drug Administration (FDA) recommends including this information as part of modified risk tobacco product applications. Regulators, including FDA, and many public health officials and researchers consider abuse liability assessment a model which predicts the likelihood that the use of the tobacco product would result in addiction and be used repeatedly or even sporadically resulting in undesirable effects.

Nicotine pharmacokinetics and subjective response among adult smokers using different flavors of on!® nicotine pouches compared to combustible cigarettes.

Rationale: on!® nicotine pouches (NPs) are oral tobacco-derived nicotine products that are tobacco-leaf free and are available in a variety of flavors and nicotine strengths. Switching completely to NPs from cigarettes may present the potential to reduce harm in adult smokers (AS) unable or unwilling to quit smoking. We characterized the abuse potential of six different flavor variants of NPs compared to cigarettes.

Characterization of the Abuse Potential in Adult Smokers of a Novel Oral Tobacco Product Relative to Combustible Cigarettes and Nicotine Polacrilex Gum.

Novel noncombustible tobacco products offer adult smokers (ASs) alternatives to combustible cigarettes lower on the continuum of risk; however, the abuse potential of such products has not been well studied. The objective of this study was to evaluate the abuse potential of 2 chewable tobacco-derived nicotine containing products, VERVE Chews Blue Mint (test 1) and Green Mint (test 2), in ASs compared with own-brand cigarettes (CIGS) and nicotine polacrilex gum (GUM) using subjective measures and nicotine pharmacokinetics. ASs used the test products during a 5-day at-home trial prior to completing an in-clinic 4-period randomized crossover study.

Characterization of puff topography of a prototype electronic cigarette in adult exclusive cigarette smokers and adult exclusive electronic cigarette users.

Puff topography is an important measure of how consumers use e-vapor products. The purpose of this study was to evaluate the feasibility of using SODIM Smoking Puff Analyzer Mobile Device (SPA/M) to measure puff topography during use of a prototype e-cigarette (e-cig) in exclusive cigarette smokers (CS) and e-cig users (EC) under ad lib conditions in a clinic. Adult CS (n = 13) and EC (EC; n = 10) completed a 7-hr use session with the e-cig (2% tobacco-derived nicotine by weight, cartridge based system approximately the size of a king size cigarette).

Indoor air quality in Virginia waterpipe cafes.

Introduction: A revised indoor air quality law has been implemented in Virginia to protect the public from the harmful effects of secondhand smoke exposure. This legislation contains exemptions that include allowances for smoking in a room that is structurally separated and separately ventilated. The objective of the current study was to examine the impact of this law on air quality in waterpipe cafés, as well as to compare the air quality in these cafés to restaurants that allow cigarette smoking and those where no smoking is permitted.

Electronic cigarettes: effective nicotine delivery after acute administration.

Introduction: Electronic cigarettes (ECs) are marketed as nicotine delivery devices. Two studies with EC-naïve participants suggest that ECs deliver little or no nicotine. In those studies, standard-sized ECs were used, though experienced EC users often use larger devices that house higher voltage and/or longer lasting batteries.

Clinical laboratory assessment of the abuse liability of an electronic cigarette.

Aims:   To provide an initial abuse liability assessment of an electronic cigarette (EC) in current tobacco cigarette smokers.

Design:   The first of four within-subject sessions was an EC sampling session that involved six, 10-puff bouts (30 seconds inter-puff interval), each bout separated by 30 minutes. In the remaining three sessions participants made choices between 10 EC puffs and varying amounts of money, 10 EC puffs and a varying number of own brand cigarette (OB) puffs, or 10 OB puffs and varying amounts of money using the multiple-choice procedure (MCP).

Discriminative-stimulus, subject-rated, and physiological effects of methamphetamine in humans pretreated with aripiprazole.

Methamphetamine is thought to produce its behavioral effects by facilitating release of dopamine, serotonin (5-HT) and norepinephrine. Results from animal studies support this notion, whereas results from human laboratory studies have not consistently demonstrated the importance of monoamine systems in the behavioral effects of methamphetamine. Human drug-discrimination procedures are well suited to assess neuropharmacological mechanisms of the training drug by studying pharmacological manipulation.

Waterpipe tobacco products: nicotine labelling versus nicotine delivery.

Background: Waterpipe tobacco package labelling typically indicates "0.0% tar" and "0.05% or 0.

Influence of escalating alternative reinforcer values on cigarette choice.

The availability of alternative reinforcers reduces drug taking. Escalating alternative reinforcer values have been used to initiate and maintain abstinence from drug use. A reset in reinforcer value has been added to the schedule of alternative reinforcer presentation to discourage relapse.

Methylphenidate increases cigarette smoking in participants with ADHD.

Rationale: Methylphenidate (Ritalin®) is commonly prescribed for behavioral problems associated with attention deficit/hyperactivity disorder (ADHD). The results of previous studies suggest that methylphenidate increases cigarette smoking in participants without psychiatric diagnoses. Whether methylphenidate increases cigarette smoking in participants diagnosed with ADHD is unknown.

Methylphenidate increases choice of cigarettes over money.

Introduction: Stimulants increase cigarette smoking in the naturalistic environment and laboratory. The effects of methylphenidate on a 9-trial, discrete cigarette versus money ($0.25) choice task were tested to elucidate the mechanisms underlying stimulant-induced increases in smoking.

A clinical laboratory model for evaluating the acute effects of electronic "cigarettes": nicotine delivery profile and cardiovascular and subjective effects.

Background: Electronic "cigarettes" are marketed to tobacco users as potential reduced exposure products (PREP), albeit with little information regarding electronic cigarette user toxicant exposure and effects. This information may be obtained by adapting clinical laboratory methods used to evaluate other PREPs for smokers.

Methods: Thirty-two smokers participated in four independent Latin-square ordered conditions that differed by product: own brand cigarette, "NPRO" electronic cigarettes (NPRO EC; 18 mg cartridge), "Hydro" electronic cigarettes (Hydro EC; 16 mg cartridge), or sham (unlit cigarette).

Human sex differences in d-amphetamine self-administration.

Unlabelled: Women and men may respond differently to the effects of stimulants such as amphetamine and cocaine.

Aim: In order to assess potential sex differences in the reinforcing effects of d-amphetamine, a retrospective-analysis was conducted on data collected from three studies that employed similar d-amphetamine self-administration procedures and used identical subject-rated drug-effect measures.

Methods: Data from 10 women and 15 men were included in the analysis.

Stimulant-induced changes in smoking and caloric intake: influence of rate of onset.

Rate-of-onset modulates the subject-rated effects of stimulants. Results of two studies from our laboratory demonstrate that immediate-release methylphenidate increases smoking and decreases caloric intake. Whether rate-of-onset influences the effects of methylphenidate on smoking and eating is unknown.

The influence of acute varenicline administration on smoking and eating behavior in humans.

Varenicline (Chantix) is a novel smoking-cessation agent that acts at a number of nicotinic acetylcholine receptors. The aim of this study was to determine the behavioral effects of acute varenicline administration in human subjects. The effects of doses of varenicline (0.

Effects of potential agonist-replacement therapies for stimulant dependence on inhibitory control in cocaine abusers.

Two experiments were conducted to determine whether methylphenidate or modafinil, two potential pharmacotherapies for stimulant dependence, would impair inhibitory behavior in cocaine users. Eleven cocaine abusers were administered methylphenidate (0, 15, 30, and 45 mg) or modafinil (0, 150, 300, and 450 mg) across four experimental sessions. A cued go-no-go task was used to measure response execution and inhibition.

Similar discriminative-stimulus effects of D-amphetamine in women and men.

The results of controlled non-human animal and human laboratory studies are mixed regarding whether women and men respond differently to stimulant drugs. In order to assess potential gender differences in the effects of D-amphetamine, we conducted a retrospective analysis of six studies conducted in our laboratory that used identical procedures and measures. Thirteen women and fourteen men learned to discriminate 15 mg oral D-amphetamine.

Acute d-amphetamine pretreatment does not alter stimulant self-administration in humans.

Recent clinical research indicates that d-amphetamine is effective in treating cocaine and methamphetamine dependence. There is concern, however, with the use of d-amphetamine as a pharmacotherapy because acute administration of d-amphetamine decreases inhibition in cocaine-using individuals and may increase drug-taking behavior. The purpose of the present experiment was to determine whether acute d-amphetamine pretreatment would alter the reinforcing, subject-rated, and cardiovascular effects of d-amphetamine.