Nicotine Dependence
Conditions
Keywords
tobacco smoking, smoking cessation, nicotine dependence, tobacco use disorder
Brief summary
The purpose of this study is to determine the efficacy, acceptability and unintended consequences of very low nicotine content cigarettes (VLNCC) in smokers with current or past year substance use disorders (SUD). The primary aim of this study is to determine whether 6 weeks of VLNCC compared to normal nicotine content cigarettes (NNCC) will result in more smoking cessation over 6 months and reduce cigarette use, cotinine, and biomarkers of toxicity. We will also assess the effects of VLNCC versus NNCC cigarettes on frequency of substance use and substance cravings (drugs and alcohol) because this is relevant to the safety of these products among smokers with SUD. Secondary aims are to study effects on cigarette craving, nicotine withdrawal and dependence, and depressed mood. Methods: Random assignment to VLNCC versus NNCC of up to 312 smokers with SUD will be balanced by gender, degree of tobacco dependence, and recent drug and alcohol use. All smokers will be provided with smoking counseling. Assessments over 6 months will assess effects both during the 6 weeks of using research cigarettes and after return to usual cigarettes. The importance is in determining the viability and safety of this public health strategy in terms of effects on both smoking and other substance use in a highly addicted population, which is essential to determine before the FDA implements this policy.
Detailed description
The 2009 passage of the Family Smoking Prevention and Tobacco Control Act (FSPTCA) gave the Food and Drug Administration (FDA) the authority to reduce levels of nicotine in cigarettes if appropriate for public health. This project addresses an area targeted for study by NIH and the FDA to assess the impact of products with reduced toxicity on tobacco use behaviors. Very-low nicotine content cigarettes (VLNCC) have been shown in some studies with smokers from the general population to reduce craving and withdrawal for tobacco relative to abstinence with little or no compensatory smoking, suggesting that a mandated reduction in the nicotine yield of cigarettes could substantially reduce smoking rates. This may be a particularly effective method of reducing smoking and smoking-related disease in special populations that have very high rates of tobacco dependence, such as people with substance use disorders (SUD). However, the consequences of this policy for smokers with SUD have not been investigated, and a call has gone out for studies of the safety of these products with vulnerable populations such as these. The purpose of this study is to determine the efficacy, acceptability and unintended consequences of VLNCC in smokers with SUD (current or past year) currently abstinent from hard drugs. The primary aims are to determine whether VLNCC will increase smoking cessation and reduce cigarette use, cotinine, and biomarkers of toxicity in smokers with SUD relative to baseline and to those randomized to a normal nicotine content cigarette (NNCC), and to determine any unintended effects of VLNCC on substance use and cravings to use substances so as to investigate safety. Secondary aims are to study effects on cigarette craving and nicotine withdrawal and dependence (mechanisms), and state depression (safety). A 2-group between-group by pre-post design will compare 6 weeks of VLNCC to NNCC; all smokers will also be provided with smoking counseling. Follow-up over 6 months will assess effects after return to usual cigarettes. The importance is in determining the viability and safety of this public health strategy in terms of effects on both smoking and other substance use in a highly addicted population, which is essential to determine before the FDA implements this policy.
Interventions
DRUGNicotine
Brief session of Brief advice. Assess smoking and provide assistance with quitting via coping skills.
Sponsors
Brown University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
: * Diagnostic and Statistical Manual-5 criteria for current or past year substance use disorder * smoke 10+ cigarettes/day for past 6 months * zero breath alcohol, negative urine drug tests and a self-report of no drug use in the past 30 days on day of informed consent * score of 4-8 on the Contemplation Ladder (individuals interested in quitting smoking someday and/or have thought about quitting)
Exclusion criteria
* active psychosis as evidenced by hallucinations or delusions * actively quitting smoking or current use of any nicotine replacement or other smoking cessation treatment * medication contraindications for smoking cessation (smoking cessation may change the bioavailability of antipsychotics, warfarin, theophylline and insulin) * other medications that could affect smoking (naltrexone, buprenorphine, acamprosate, anti-seizure medications, disulfiram) * if on psychotropic medications, not stabilized on psychotropic medications (i.e., anti-depressant, anti-anxiety or anti-manic medications changed within past 4 weeks) * inability to understand informed consent in a test (true-false questions) on the key elements of the consent form
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 7-day point-prevalence smoking abstinence | 6 weeks | self-report of past 7 days abstinence confirmed by expired carbon monoxide (CO) reading of 6 ppm or less |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Beck Depression Inventory | Baseline and 6 weeks | Beck Depression Inventory will be administered at baseline and 6 weeks to detect any change in depression scores from baseline |
| 3-hydroxypropylmercapturic acid (3-HPMA) | 6 weeks | Urinary 3-hydroxypropylmercapturic acid (3-HPMA) provides a measure of a metabolite of the toxicant acrolein |
| Total urinary cotinine levels | 6 weeks | cotinine plus cotinine-glucuronide, assessed via urinalysis |
| duration of longest tobacco abstinence period | 6 weeks | Time Line Follow Back (TLFB) for tobacco use will be used to record self-reported tobacco abstinence each day. The longest number of contiguous abstinence days will be recorded. |
| Questionnaire of Smoking Urges, Brief Form | 6 weeks | Questionnaire of Smoking Urges, Brief Form assesses strong desire/intention to smoke and anticipating negative-affect relief from smoking. The total score from the 10 items will be used. |
| Total N'-nitrosonornicotine (NNAL) | 6 weeks | Urinary N'-nitrosonornicotine and its glucuronide provide a measure of metabolites of the tobacco-specific carcinogen N'-nitrosonornicotine |
| Number of cigarettes smoked per day | 6 weeks | Time Line Follow Back for tobacco use will assess self-reported number of cigarettes smoked each day |
| Number of substance use days | 6 months | Time Line Follow Back will assess self-reported number of days of drinking or drug use. Any days of either will be counted as a substance use day. |
| Total N'-nitrosonornicotine (NNN) | 6 weeks | Urinary N'-nitrosonornicotine and its glucuronide provide a measure of metabolites of the tobacco-specific carcinogen N'-nitrosonornicotine |
| 3-hydroxypyrene (3-HOP) | 6 weeks | Urinary 3-hydroxypyrene and its glucuronide and sulfate provides a measure of a metabolite of pyrene, a biomarker for uptake of carcinogenic polycyclic aromatic hydrocarbons |
Other
| Measure | Time frame | Description |
|---|---|---|
| Drug Craving Questionnaire | 6 weeks | Adapted from Tiffany's Cocaine Craving Questionnaire to assess craving for any drugs over the previous week. Administered weekly for 6 weeks, the mean of the scores over 6 weeks will be used as the outcome variable. |
| Change in Contemplation Ladder | Baseline and 6 weeks | The 10-point Contemplation Ladder provides a single continuous measure of motivation to quit smoking. Change from baseline to 6 weeks will be used as the outcome. |
| Penn Alcohol Craving Scale | 6 weeks | Assessment of craving for alcohol over the previous week. Administered weekly for 6 weeks, the mean of the 6 weeks will be used as the outcome variable. |
| Minnesota Nicotine Withdrawal Scale | 6 weeks | ratings of 7 nicotine withdrawal symptoms will be combined to form a single score for withdrawal |
Countries
United States
Outcome results
None listed