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Measuring Smoking Behaviors While Using Varenicline

15 december 2014 bijgewerkt door: Andrew Strasser, University of Pennsylvania

Assessment of Smoking Topography and Behaviors During Response to Varenicline

This study will demonstrate the behavioral responses to varenicline, helping to better understand its mechanisms. Hypotheses for the study are to observe decreases in smoking topography and nicotine cigarette choice on varenicline, relative to placebo; and decreases on day 21 relative to day 7 during varenicline treatment. We also propose to examine if extended duration of treatment has clinical significance in decreasing smoking behaviors, thus increasing the efficacy of varenicline.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This study is designed to examine the behavioral responses a cigarette smoker may have to using varenicline. Behavioral responses may help to better understand its mechanisms which in turn could improve treatment outcomes. The primary hypothesis for the study is to observe decreases in smoking topography, an objective measure of smoking behavior or puffing, on varenicline, relative to placebo; and decreases on day 21 relative to day 7 during varenicline treatment. We will also examine puffing and nicotine cigarette choices during lab visits at baseline, and Days 7 and 21. We also propose to examine if extended duration of treatment has clinical significance in decreasing smoking behaviors, thus potentially increasing the efficacy of varenicline.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

48

Fase

  • Fase 4

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Verenigde Staten
    • Pennsylvania
      • Philadelphia, Pennsylvania, Verenigde Staten, 19104
        • Tobacco Use Research Center

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

21 jaar tot 65 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • self report minimum 10 daily cigarettes
  • self report smoking every day past 5 years
  • between the ages 21-65
  • self report intention to try to quit smoking in the next 6 months

Exclusion Criteria:

  • self reported use of any nicotine-containing products other than non-menthol cigarettes
  • self reported history or current treatment of substance abuse (other than nicotine dependence)
  • self reported alcohol use greater than 25 standard drinks per week;
  • currently pregnant, planned pregnancy or lactating (females: negative urine pregnancy screen)
  • self reported history or current diagnosis of any Axis 1 disorders except past depression
  • self reported serious or unstable disease within past year
  • self reported history of epilepsy or seizure disorder;
  • self reported history or current diagnosis of COPD (chronic obstructive pulmonary disease), cardiovascular disease, heart attack, or uncontrolled hypertension
  • self reported kidney function impairment
  • any current or recent (30 day) use of: smoking cessation medications, anti-psychotics, anti-depressants, anti-anxiety, panic medications, stimulants or opiate-containing medications
  • less than 5 years of daily smoking
  • any medical condition or concomitant medication that could compromise participant safety or treatment
  • provide a baseline carbon monoxide (CO) reading < 10 ppm
  • self reported use of non filtered cigarettes
  • inability to provide informed consent or complete any of the study tasks as determined by the Principal Investigator and/or Study Physician

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Crossover-opdracht
  • Masker: Dubbele

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Varenicline before placebo

Drug (Varenicline (Chantix)): Placebo

Intervention to be administered is: participants will receive standard dosing regimen of Varenicline for 21 days total, followed by 14-day washout and 21 days of placebo. Standard dosing: 0.5 mg days 1-3; 0.5 mg bid days 4-7; 1.0 mg bid days 8-21.
Geneesmiddel: Varenicline
Intervention Drug (Varenicline (Chantix) will be administered in standard dosing in pill format: 0.5 mg days 1-3; 0.5 mg bid daily days 4-7; 1.0 mg bid daily days 8-21.
Andere namen:
  • Chantix
Experimenteel: Placebo then Varenicline

Placebo: Drug Varenicline (Chantix)

Intervention to be administered is: participants will receive 21 days of placebo, followed by 14-day washout and standard dosing regimen of Varenicline for 21 days total. Standard dosing: 0.5 mg days 1-3; 0.5 mg bid days 4-7; 1.0 mg bid days 8-21.

Intervention 'Drug (Varenicline (Chantix)): Placebo'
Geneesmiddel: Varenicline
Intervention Drug (Varenicline (Chantix) will be administered in standard dosing in pill format: 0.5 mg days 1-3; 0.5 mg bid daily days 4-7; 1.0 mg bid daily days 8-21.
Andere namen:
  • Chantix

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Smoking Topography: Total Puff Volume
Tijdsspanne: Days 1-21 of each of 2 study periods
Total puff volume was created by summing all of the puffs from the cigarette smoked in the lab at each time point (each lab visit). This value represents the total volume of smoke extracted from a single cigarette and it a standard measure of smoking behavior. A total puff volume represents the total smoking volume from a cigarette. Values are reported in milliliters. Value of interest is the average puff volume across all sessions for all participants in a group and is reported as a key measure of smoking behavior. Analyses were repeated measures analysis of variance where individual, time and drug were within factors.
Days 1-21 of each of 2 study periods
The Number of Choices of a Nicotine Containing Cigarette Compared to a Non-nicotine Cigarette.
Tijdsspanne: Days 1, 7, 21 of each of two 21 day study periods
Participants were given 4 puff choices (between a nicotine containing and de-nicotinized cigarette) on 6 study visits, for a total of 24 choices. Number of puffs reported is average across both study periods.
Days 1, 7, 21 of each of two 21 day study periods
Daily Cigarette Consumption
Tijdsspanne: Two 21 day study periods
Average of the number of cigarettes smoked per day
Two 21 day study periods

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Total Nicotine Metabolites From Urine Samples
Tijdsspanne: Samples from Day 1 and Day 21 of two 21 day Periods
Total urinary metabolites from urine samples collected at Day 1 and Day 21
Samples from Day 1 and Day 21 of two 21 day Periods
Nicotine Levels From Urine Samples
Tijdsspanne: Samples from Day 1 and Day 21 of two 21 day Periods
Nicotine levels from urine samples collected at Day 1 and Day 21.
Samples from Day 1 and Day 21 of two 21 day Periods
Cotinine Levels From Urine Samples
Tijdsspanne: Samples from Day 1 and Day 21 of two 21 day Periods
Cotinine levels from urine samples collected at Day 1 and Day 21.
Samples from Day 1 and Day 21 of two 21 day Periods
Carbon Monoxide Levels
Tijdsspanne: Samples from Day 1 and Day 21 of two 21 day Periods
Exhaled breath carbon monoxide levels collected at Day 1 and Day 21 sessions. Alveolar carbon monoxide is a validated assessment of smoke exposure.
Samples from Day 1 and Day 21 of two 21 day Periods
Subjective Measures to Assess Smoking Urges
Tijdsspanne: Days 21 of each of the two 21-day study periods, range 1(low)-7(high)
Craving for cigarettes was assessed with the 32-item Questionnaire of Smoking Urges (QSU) during each study visit. In order to calculate the QSU measure, each item is rated on a Likert-type scale from 1 (strongly disagree) to 7 (strongly agree). The values are then summed to create a single total score. Well validated 2 factor subscale scores were also created by summing the item scores for the 2 factors: Factor 1 reflects the desire to smoke for pleasure and Factor 2 reflects urges to smoke to relieve withdrawal-related negative affect. Internal consistency for each scale across all time points was high (Cronbach's α > 0.95, 0.85, and 0.95 for Factor 1, Factor 2, and QSU total, respectively). Scale range is 1-7 where 1 is low urge to smoke and 7 represents high urge to smoke. Data was collected at each time point but outcome measure of interest is end of period.
Days 21 of each of the two 21-day study periods, range 1(low)-7(high)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

University of Pennsylvania

Medewerkers

Pfizer

Publicaties en nuttige links

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Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start

1 januari 2009

Primaire voltooiing (Werkelijk)

1 november 2010

Studie voltooiing (Werkelijk)

1 november 2010

Studieregistratiedata

Eerst ingediend

28 juli 2009

Eerst ingediend dat voldeed aan de QC-criteria

28 juli 2009

Eerst geplaatst (Schatting)

29 juli 2009

Updates van studierecords

Laatste update geplaatst (Schatting)

16 december 2014

Laatste update ingediend die voldeed aan QC-criteria

15 december 2014

Laatst geverifieerd

1 december 2014

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 808930

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