Key results of the EAGLES trial
The researchers found no significant increase in serious neuropsychiatric AEs—a composite measure assessing depression, anxiety, suicidality, and 13 other symptom clusters—attributable to varenicline or bupropion compared with placebo or the nicotine patch in smokers with or without psychiatric disorders. The study did detect a significant difference—approximately 4% (2% in non-psychiatric cohort vs 6% in psychiatric cohort)—in the rate of serious neuropsychiatric AEs regardless of treatment condition. In both cohorts, varenicline was more effective than bupropion, which had similar efficacy to the nicotine patch; all interventions were superior to placebo. Importantly, all 3 medications significantly improved quit rates in smokers with and without psychiatric disorders. Although the efficacy of medications in smokers with or without psychiatric disorders was similar in terms of odds ratios, overall, those with psychiatric disorders had 20% to 30% lower quit rates compared with non-psychiatrically ill smokers.
The EAGLES study results, when viewed in the context of findings from other clinical trials and large-scale observational studies, provide further evidence that smokers with stable mental illness can use bupropion and varenicline safely. It also demonstrates that moderate to severe neuropsychiatric AEs occur during a smoking cessation attempt regardless of the medication used, therefore, monitoring smokers—especially those with psychiatric disorders—is important, a role that psychiatrists are uniquely poised to play.
That all 3 smoking cessation medications are effective in patients with mood, anxiety, and psychotic disorders is good news for our patients. Combined with the EAGLES safety findings, there is no better time to intervene in tobacco dependence