Clinical trial NCT00749658: Human Laboratory Study of Varenicline and Bupropion for Nicotine Dependence
Official title: Human Laboratory Study of Varenicline and Bupropion for Nicotine Dependence
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
PHASE3
Conditions: Nicotine Dependence
Nicotine Withdrawal
Keywords: Tobacco
Nicotine
Smoking
Varenicline
Bupropion
Human laboratory study
Stress tolerance
Startle response
Cognitive assessment
Progressive ratio
Motivation
Lead sponsor: University of Minnesota
Sponsor class: OTHER
Collaborators: name: National Institute on Drug Abuse (NIDA)
name: Pfizer
First posted: 2008-09-09
Enrollment: 121
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: The objective of this proposal is to elucidate effects of bupropion SR + varenicline on smoking-cessation related processes in early abstinence using a human laboratory model. A within-subjects design will be used to assess the additive effects of bupropion and varenicline in 48 treatment seeking smokers \[bupropion SR (300 mg/day)+placebo, varenicline (2 mg/day+placebo, and bupropion SR (300 mg/day)+varenicline (2 mg/day)\]. Outcomes include withdrawal and craving, cognition, stress tolerance, anxiety, the reinforcing effects of smoking, and smoking topography.

Hypotheses: We hypothesize that greatest treatment effects will be observed in the bupropion SR+varenicline group followed by varenicline+placebo and bupropion SR+placebo groups.


Eligibility criteria: Inclusion Criteria:

1. 18 years and up.
2. Smoked at least 10 cigarettes/day for at least 1 year.
3. English speaking and reading.
4. Females who are of childbearing potential must practice effective contraception and meet the following criteria:

   1. Are instructed to avoid pregnancy through 30 days after the last dose of study medication.
   2. Have a negative urine pregnancy test at baseline.
   3. Agree to use of the birth control methods listed: an oral contraceptive agent, an intrauterine device (IUD), an implantable contraceptive (e.g., Norplant), or an injectable contraceptive (e.g., Depo-Provera) for at least one month prior to entering the study and will continue its use through at least 30 days after the last dose of the study medication. A barrier method of contraception (e.g., condom or diaphragm with spermicide) while participating in the study and 30 days after the last dose of study medication.
5. Willingness to not use illicit drugs during study period including marijuana.

Exclusion Criteria:

1. Any unstable medical condition.
2. Unstable angina, myocardial infarction, or coronary angioplasty within the past 3 months or an untreated cardiac dysrhythmia.
3. Personal history of seizures.
4. Closed head trauma with any loss of consciousness or amnesia in the last 5 years.
5. A history of closed head trauma with \> 30 minutes of loss of consciousness or amnesia or resulting in skull fracture or subdural hematoma/brain contusion.
6. A history of psychosis, bipolar disorder, bulimia or anorexia nervosa.
7. Current depression as assessed by Center for Epidemiologic Studies Depression Scale (CES-D).
8. Medications that might affect the outcome measures of nicotine reward, cognition, anxiety, and stress will also be a basis for exclusion. These medications include psychotropic drugs (i.e., anti-psychotic, anti-depressant, anti-anxiety, or stimulant), anti- hypertensive agents (e.g., beta-blockers), and other drugs that can influence the outcome domains.
9. Active substance abuse other than nicotine.
10. Used an investigational drug within the last 30 days.
11. Are currently using a behavioral or pharmacologic tobacco treatment.
12. Use of bupropion or varenicline in the previous 30 days.
13. Current (past 14 days) use of antipsychotic or antidepressant medications.
14. An allergy to bupropion or varenicline.
15. Untreated hypertension or baseline systolic blood pressure \> 180 or diastolic \> 100.
16. Impaired kidney function (creatinine clearance \< 30).
17. Having plans to leave the immediate geographical area within 2 months.
18. Unwillingness or inability to give written informed consent.

    -

Primary outcomes:
measure: Nicotine Withdrawal and Craving
timeFrame: Change from Base line to 33 weeks
Secondary outcomes:
Other outcomes:
Locations:
city: Minneapolis
country: United States
facility: University of Minnesota, Tobacco Use Research Center
state: Minnesota
Study officials:
affiliation: University of Minnesota
name: Marc E Mooney, Ph.D.
role: PRINCIPAL_INVESTIGATOR
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