Assessment of High Dose Transdermal Nicotine for Fast Metabolizers of Nicotine

NCT ID: NCT00956943

Last Updated: 2014-08-15

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 87 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2009-08-31
• Study Completion Date: 2011-08-31

Brief Summary

Unfortunately, the investigators still need to assess and identify novel ways to help people quit smoking. Differences between people in terms of how fast they metabolize nicotine influences response to transdermal nicotine patches, the most popular nicotine dependence treatment, and it affects plasma levels of nicotine from treatment. These studies suggest that fast metabolizers of nicotine may show better quit rates if they receive higher doses of transdermal nicotine. This preliminary study is designed to assess, for the first time, whether fast nicotine metabolizers show higher quit rates if given high dose transdermal nicotine, versus standard dose. The study findings may help to support a subsequent large trial to assess standard versus high dose transdermal nicotine for slow versus fast metabolizers of nicotine, which may lead to a more personalized approach to treating nicotine dependence using the nicotine patch to improve therapeutic benefits of transdermal nicotine.

Detailed Description

Novel approaches to treating nicotine dependence remain a priority. The transdermal nicotine patch is the most widely used form of tobacco dependence treatment, but only ~1 in 5 smokers who use this treatment achieve cessation. One factor that may contribute to a poor response to transdermal nicotine is inter-individual variability in the rate of nicotine metabolism, which can be measured in saliva by the ratio of 3'hydroxycotinine (3-HC) to its precursor cotinine.

Two clinical trials with transdermal nicotine have shown that the 3-HC/cotinine ratio predicts response to transdermal nicotine such that faster metabolizers of nicotine (higher 3-HC/cotinine ratios) have lower quit rates, vs. slower nicotine metabolizers. Among abstainers in these trials, the 3-HC/cotinine ratio also predicts therapeutic levels of nicotine on transdermal nicotine, with faster metabolizers of nicotine exhibiting lower nicotine. Thus, faster metabolizers of nicotine may require higher nicotine doses to achieve the same therapeutic benefit from transdermal nicotine as do slow nicotine metabolizers.

To date, clinical trials have shown that, compared to the standard dose of transdermal nicotine (21mg), higher doses (42mg) have no significant effect on quit rates. However, no trial of high dose transdermal nicotine considered inter-individual variability in the rate of nicotine metabolism. Thus, as a preliminary step toward conducting a fully-powered, randomized clinical trial to assess standard vs. high dose transdermal nicotine for slow vs. fast metabolizers of nicotine, we propose to evaluate, for the first time, the efficacy of high-dose transdermal nicotine (vs. standard dose) among fast metabolizers of nicotine (i.e., upper quartile of the 3-HC/cotinine ratio distribution).

We chose only fast metabolizers of nicotine for this trial since: 1) slow metabolizers of nicotine exhibit high quit rates on standard transdermal nicotine and may experience adverse effects from higher doses; and 2) as a "proof of concept" R21 application, our primary objective is to test whether high doses of nicotine increase quit rates among fast metabolizers of nicotine. Specifically, smokers who are fast metabolizers of nicotine will receive counseling and will be randomized to: 1) standard (1 X 21mg patch and 1 X placebo patch), or 2) high dose (2 x 21mg patches) transdermal nicotine.

The primary outcome is biochemically-verified 7-day point prevalence cessation after 8 weeks of treatment. Differences in patch-related side effects and mediators of transdermal nicotine effects (e.g., nicotine levels, withdrawal) across the study conditions will also be assessed.

Ultimately, this line of research hopes to provide the evidence necessary to translate research on the 3-HC/cotinine ratio to clinical practice for the treatment of tobacco dependence. Specifically, this research may show that a measure of nicotine metabolism rate could be used to maximize the therapeutic benefits of transdermal nicotine by providing slow metabolizers of nicotine with a standard patch dose and fast metabolizers of nicotine with high dose transdermal nicotine. Identifying an effective treatment for faster metabolizers of nicotine is also critical since these individuals are at increased risk for lung cancer.

Conditions

Nicotine Dependence

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: FACTORIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

21mg transdermal nicotine + placebo patch

21mg transdermal nicotine + placebo patch

Group Type: ACTIVE_COMPARATOR

Nicoderm CQ transdermal nicotine

Intervention Type: DRUG

Transdermal nicotine patch (21mg vs. 42mg), 8 weeks

placebo

Intervention Type: DRUG

placebo patch

42mg transdermal nicotine

42mg transdermal nicotine

Group Type: EXPERIMENTAL

Nicoderm CQ transdermal nicotine

Intervention Type: DRUG

Transdermal nicotine patch (21mg vs. 42mg), 8 weeks

Interventions

Nicoderm CQ transdermal nicotine

Transdermal nicotine patch (21mg vs. 42mg), 8 weeks

Intervention Type: DRUG

placebo

placebo patch

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Males and females age 18-45 who smoke > 10 cigarettes/ day;

2. Able to communicate in English;

3. Able to use NRT safely (e.g., no allergy to latex);

4. Able to provide written informed consent for study procedures;

5. Residing in the geographic area for at least 6 months; and

6. A 3-HC/cotinine ratio in the top quartile of the distribution (Schnoll et al., 2008). Age 45 was selected as an upper limit to reduce the likelihood of adverse effects from high dose transdermal nicotine.

Exclusion Criteria

1. History of substance abuse or currently receiving treatment for substance abuse (e.g., alcohol, opioids, cocaine, marijuana);

2. Current (last 6-months) alcohol consumption that exceeds 25 standard drinks/week.

3. Current use or discontinuation within last 14 days of:

• Smoking cessation medications (bupropion, Chantix, NRT);
• Antipsychotics, atypicals, mood-stabilizers, anti-depressants (tricyclics, SSRIs, MAOIs), anti-panic agents, anti-obsessive agents, anti-anxiety agents, stimulants);
• Medication for pain;
• Anti-coagulants;
• Heart medications;
• Daily medication for asthma or diabetes.

4. Women who are pregnant, planning a pregnancy, or lactating;

5. History or current diagnosis of psychosis, major depression or bipolar disorder, psychotic disorder, or generalized anxiety disorder;

6. Serious/unstable disease within the past 6 months (e.g., cancer [but melanoma], HIV/AIDS);

7. History of epilepsy or seizure disorder;

8. History or diagnosis within the last 6 months of abnormal rhythms and/or tachycardia (>100 beats/minute); history or current diagnosis of COPD, cardiovascular disease (stroke, angina), heart attack in the last 6 months, uncontrolled hypertension (SBP>150 or DBP>90);

9. History of kidney or liver failure.

10. Any medical condition or medication that could compromise safety as determined by a study physician;

11. Inability to provide informed consent or complete the study tasks as determined by the Principal Investigator or study physician.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 45 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Pennsylvania

OTHER

Sponsor Role: lead

Responsible Party

Robert Schnoll

Associate Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Robert A Schnoll, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Pennsylvania

Locations

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Countries

United States

Other Identifiers

R21DA026889

Identifier Type: NIH

Identifier Source: secondary_id

View Link

809716

Identifier Type: -

Identifier Source: org_study_id