The impact of anticipated and unanticipated smoking opportunities on cigarette smoking and nicotine lozenge responses

Non-pharmacological Considerations in Human Research of Nicotine and Tobacco Effects: A Review

Human research of nicotine and tobacco effects demonstrates that non-pharmacological factors may systematically affect responses to administered substances and inert placebos. Failure to measure or manipulate these factors may compromise study reliability and validity. This is especially relevant for double-blind placebo-controlled research of nicotine, tobacco, and related substances. In this article, we review laboratory-based human research of the impact of non-pharmacological factors on responses to tobacco and nicotine administration. Results suggest that varying beliefs about drug content and effects, perceptions about drug use opportunities, and intentions to cease drug use systematically alter subjective, behavioral, and physiological responses to nicotine, tobacco, and placebo administration. These non-pharmacological factors should be considered when designing and interpreting the findings of human research of nicotine and tobacco effects, particularly when a double-blind placebo-controlled design is used. The clinical implications of these findings are discussed, and we propose methodological strategies to enhance the reliability and validity of future research.

IMPLICATIONS

Growing research demonstrates that non-pharmacological factors systematically alter responses to acute nicotine, tobacco, and placebo administration. Indeed, varying beliefs about nicotine and/or tobacco administration and effects, differing perceptions about nicotine and/or tobacco use opportunities, and inconsistent motivation to quit smoking have been found to exert important influences on subjective, physiological, and behavioral responses. These variables are infrequently measured or manipulated in nicotine and tobacco research, which compromises the validity of study findings. Incorporating methodological strategies to better account for these non-pharmacological factors has the potential to improve the quality of addiction research and treatment.

Evaluating the influences of social support and smoking cues on daily smoking abstinence among socioeconomically disadvantaged adults

INTRODUCTION

Perceived social support and smoking cues, such as cigarette availability, are important factors that affect smoking cessation outcomes. However, very few studies examine the influences of social support and smoking cues on lapse during a quit attempt.

METHODS

Socioeconomically disadvantaged smokers participating in a smoking cessation program at a safety net hospital completed smartphone-based ecological momentary assessments (EMAs) for two consecutive weeks (1-week pre-quit through 1-week post-quit). A mixed-effects logistic regression model was used to evaluate whether perceived support to quit smoking, perceived pressure to quit smoking, and situational cues (i.e., being offered a cigarette) were related to the likelihood of reporting smoking cigarettes on any EMA within a day.

RESULTS

Perceived social pressure and support to quit were not related to daily smoking status. Participants were more likely to smoke on days when they were offered a cigarette compared to days when no such event occurred (OR = 3.31 [95% CI = 1.21, 9.06]). This effect was also significant after adjusting for perceived social pressure to quit and support to quit (OR = 3.38 [95% CI = 1.23, 9.31]).

CONCLUSION

The results suggest that being offered a cigarette negatively impacts smoking cessation. The results reinforce the need for including cigarette refusal skills in smoking cessation treatment to reduce the likelihood of smoking lapse among socioeconomically disadvantaged adults.

Quit Intentions Moderate Subjective and Physiological Responses to Acute Nicotine Replacement Therapy Administration in Dependent Smokers

Introduction

This study assessed the impact of expectancy and administration components of acute nicotine inhaler use on craving, heart rate, and smoking behavior in smokers with varying intentions to quit.

Methods

47 dependent smokers that differed in self-reported intention to quit (no intention to quit during the next month N = 26 vs. intention to initiate a quit attempt within 2 weeks N = 21) were randomly administered a 4 mg nicotine or nicotine-free inhaler across two sessions. Instructions regarding the inhaler's nicotine content (expect nicotine vs. expect nicotine-free; nicotine expectancy) and flavor (mint vs. citrus) varied across sessions. Craving and heart rate were assessed before and after inhaler administration (two-second inhalations every 10 seconds over 20 minutes). Next, participants were offered an opportunity to self-administer puffs of their preferred tobacco brand during an hour-long progressive ratio task.

Results

Across participants, nicotine expectancy independently reduced withdrawal related craving (p = .018), but no comparable effects of nicotine administration were evident. In quitting motivated smokers, nicotine expectancy and administration interacted to reduce intention to smoke (p = .040), while nicotine expectancy (p = .047) and administration (p = .025) independently reduced intention to smoke in quitting unmotivated smokers. Blunted heart rate reactivity to nicotine administration was observed in quitting motivated relative to unmotivated smokers (p = .042); however, neither expectancy nor administration impacted smoking behavior in either group (p values > .25).

Conclusions

Findings indicate that participant quitting intentions moderate acute nicotine replacement therapy responses. In quitting motivated smokers, a combination of pharmacological and psychological factors may be necessary for nicotine replacement therapy to impact craving.

Implications

Findings from this study demonstrate that motivations to quit smoking moderate subjective and physiological responses to acute nicotine administration and expectancy in dependent cigarette smokers. Quitting motivated smokers showed blunted heart rate reactivity to nicotine administration, suggesting that they may be less sensitive to the rewarding aspects of nicotine consumption. Nicotine administration and expectancy were found to interact to reduce craving in quitting motivated but not in unmotivated smokers, suggesting that pharmacological and psychological factors may be necessary for nicotine replacement therapy to impact craving in smokers who plan to quit.

Premenstrual symptoms and factors implicated in smoking cessation among woman smokers

Premenstrual symptoms (PMS) may reduce smoking cessation success. Yet, little is known about the factors that may impact smoking cessation among women with elevated PMS, leaving little data to guide smoking cessation science and practice for this population. This cross-sectional study is a secondary analysis of data from laboratory studies focused on menstrual cycle effects and smoking. Premenopausal woman daily smokers (n = 157) completed self-report measures of tobacco dependence and other cessation-relevant factors (i.e., smoking cessation history, withdrawal during previous quit attempts, use of smoking cessation aids) as well as a measure assessing 3 domains of PMS-affective, water retention, and pain. After controlling for depression and race, affective PMS were associated with greater daytime tobacco dependence, withdrawal symptoms during most recent quit attempt, and number of smoking cessation aids used in past quit attempts (βs = .19-.28, ps < .05). Additionally, affective PMS were associated with increased odds of having used e-cigarettes during past quit attempts (odds ratio = 1.54, 95% confidence interval [1.06, 2.24]) after adjusting for depression and race. These results across different domains of PMS suggest that affective PMS may play a particularly important role in smoking cessation. Women with elevated affective PMS may be more inclined to try cessation aids and require special clinical attention to controlling tobacco withdrawal during quit attempts to increase success. (PsycINFO Database Record

The impact of social context on cigarette self-administration in nondependent smokers

Tobacco use in nondependent smokers (i.e. chippers) is believed to be largely determined by situational factors including social context. However, little empirical research has examined how different social contexts impact chippers' smoking behaviour. Twenty-eight (16 men) chippers completed two laboratory sessions where they were offered an opportunity to self-administer puffs of their preferred tobacco brand using a progressive ratio task. During an individual session, participants self-administered cigarettes alone and during a paired session, they self-administered cigarettes with a coparticipant who was also smoking. The strongest predictors for number of self-administered puffs and breakpoint during the paired session were coparticipants' number of puffs and breakpoint, respectively (P<0.001), followed by puffs taken and breakpoint during the individual session (P<0.01). Current smoking frequency (cigarettes/week) did not significantly predict puffs taken or breakpoint during the paired session. Latency to cigarette self-administration during the paired session was correlated positively with coparticipants' latency (P<0.05), but not with latency during the individual session or cigarettes per week. The findings suggest that the presence of another smoker exerts an important influence on the quantity of chippers' smoking behaviour, such that chippers match their smoking behaviour to that of other smokers in their proximate environment.

Does acute tobacco smoking prevent cue-induced craving?

BACKGROUND

Smoking cessation aids appear to be limited in their ability to prevent craving triggered by exposure to smoking-associated stimuli; however, the extent to which cue-induced cravings persist following denicotinized or nicotine-containing tobacco smoking is not known.

METHODS

Thirty (17 male) ⩾12-hour abstinent dependent smokers completed two sessions during which they smoked a nicotine-containing or denicotinized cigarette. Instructions regarding the nicotine content of the cigarette varied across sessions, and all participants were exposed to a neutral cue followed by a smoking cue after cigarette consumption. Craving was assessed before and after cigarette consumption and cue exposure.

RESULTS

Reduced intentions to smoke were associated with both nicotine expectancy (p<0.05) and nicotine administration (p<0.01), while reduced withdrawal-related craving was uniquely associated with nicotine administration (p<0.05). Smoking-associated stimuli increased craving regardless of nicotine expectancy or administration (p-values<0.001).

CONCLUSIONS

While both nicotine pharmacology and expectancy appear to contribute to craving reduction associated with acute tobacco smoking, neither smoking-related nicotine administration nor expectation prevents increases in craving following exposure to smoking-associated stimuli. These findings suggest that cue-induced craving may be resistant to various pharmacological and psychological interventions.