Dtsch Arztebl Int
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Meta Analysis
Weaning From Tobacco with Nicotine or Varenicline in Severe and Mild Tobacco Dependence—Findings of a Meta-Analysis.
Systematic reviews have documented the beneficial effects of bupropion, cytisine, nicotine, and varenicline as aids to permanent smoking cessation. We investigated the question whether the effect of treatment depends on the severity of tobacco dependence. ⋯ The benefit of varenicline and nicotine as aids to smoking cessation is independent of the severity of tobacco dependence.