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Using Non-invasive Brain Stimulation (tDCS) With Varenicline for Treating Tobacco Dependence

Smoking Cessation Clinical Trial

Official title:
Using Non-invasive Brain Stimulation (tDCS) to Improve the Effectiveness of Varenicline for Treating Tobacco Dependence: a Randomized Controlled Trial

Clinical Trial Summary

The addition of tDCS as an adjunct to pharmacotherapy is a novel approach but one that is grounded in a growing evidence-base.The primary objective of this research is to provide preliminary evidence of the effectiveness of tDCS as an adjunct treatment to pharmacotherapy for smoking cessation. The investigators hypothesize that the addition of active tDCS to the left DLPFC will improve the effectiveness of varenicline as reflected by higher quit rates at end of treatment compared to the sham group. Smoking status will be biochemically confirmed at various time points using expired cotinine measures. Furthermore, the investigators will be collecting neuroimaging (fMRI) data as well as measures of attentional bias to explore the neurological and physiological correlates from using adjunct tDCS and varenicline therapy.

Clinical Trial Description

While varenicline on its own is the most effective medication for smoking cessation, long-term abstinence is still relatively poor. The primary objective of this study is to evaluate the effectiveness of adjunct active tDCS with varenicline in treating tobacco dependence. This study is a double-blind, sham-controlled, randomized clinical trial where 50 daily dependent treatment seeking smokers will be recruited at the Nicotine Dependence Clinic in Toronto, Canada. Participants will be receiving twelve weeks of varenicline treatment (1mg b.i.d.) and randomized 1:1 to either active tDCS (active: 20 minutes at 2 mA) or sham tDCS (30 seconds at 2 mA, 19.5 minutes at 0 mA), daily (M-F) for the first 2 weeks and then every 2 weeks for the next 10 weeks. There will be 2 fMRI scans at baseline and 1 scan at end-of-treatment. Eye-tracking viewing tests will be conducted at baseline, weeks 4, 8, 12 and at 6 months follow up. During the 6 month follow-up, participants will be answering questions regarding their smoking behaviour and craving. Smoking status will be biochemically confirmed at each study visit using expired cotinine. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03841292
Study type Interventional
Source Centre for Addiction and Mental Health
Contact
Status Completed
Phase N/A
Start date October 1, 2018
Completion date January 31, 2022
View Details
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