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New treatment for depressed smokers trying to quit


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Researchers pinpoint why depressed smokers have a harder time resisting relapses -


Northwestern Medicine researchers have pinpointed why quitting smoking is particularly difficult for depressed people and now are testing a new smoking cessation treatment combining medication and behavioral activation therapy targeted at this population.


The paper, an extensive review of current research, offers a much deeper understanding of why nicotine withdrawal symptoms for people with depression make it much more difficult to quit smoking. The paper is published in the journal Addiction.


See Also: Smoking thins vital part of brain


"We've used this new theory of withdrawal in depressed smokers to develop the first targeted approach for smoking cessation in this underserved population," said senior author Brian Hitsman, associate professor of preventive medicine and of psychiatry and behavioral sciences at Northwestern University Feinberg School of Medicine.


Depressed smokers experience adverse withdrawal states that contribute to resumption of smoking, including low mood, difficulty engaging in rewarding activities and impaired thinking/memory, the paper reports. These symptoms are more severe for people with depression than for those without depression. In addition, depressed smokers tend to have fewer ways to cope with the symptoms and the nicotine in cigarettes helps to mitigate these problems, which is why depressed people tend to relapse at higher rates.


"Many smokers learn, 'If I smoke in this situation, my mood gets better.' But while smoking improves mood in the short term, it produces a long-term decline in mood," said lead author Amanda Mathew, research assistant professor in preventive medicine at Feinberg and a licensed clinical psychologist. "On the other hand, successfully quitting smoking is associated with improvements in mental health."


Read Next: Brains of smokers who quit successfully might be wired for success


The review found that depressed smokers' first adverse state while trying to quit is a combination of "low positive affect" (low pleasure and engagement in rewarding activities, such as socializing or physical activity) and "high negative affect" (feelings of anger, sadness, guilt or anxiety). The second adverse state is "cognitive impairment" (difficulty making decisions, focusing and memory).


The study's researchers have begun testing a treatment that targets the specific challenges depressed smokers face when they're quitting. People who have clinical depression have typically been excluded from smoking cessation clinical trials.


The U.S. Food and Drug Administration- (FDA-) approved medication Chantix is coupled with a type of behavior therapy called "behavioral activation" to treat the depressed smokers. Researchers are investigating whether Chantix reverses thinking and memory problems that depressed smokers experience during withdrawal, and whether the behavioral activation improves smokers' moods so they engage in normal pleasurable activities, and thus have less desire to smoke and are able to resist relapsing.


Behavioral activation is an effective treatment for depression, but this is the first time it is being used as a treatment for smoking cessation among depressed smokers.


Learn More: Neural reward response may demonstrate why quitting smoking is harder for some


The clinical study is being conducted at Northwestern Memorial Hospital and the University of Pennsylvania and is currently accepting participants.


"People have thought for some time that depressed smokers have difficulty quitting because they experience a more pronounced withdrawal syndrome, but the evidence is scarce because depressed smokers are hard to recruit and consequently have not been as studied," said coauthor Lee Hogarth, associate professor of psychology at the University of Exeter in England. "But now we have gathered together convincing empirical support for this theory, which can be used to justify new treatment approaches."


Note: Material may have been edited for length and content. For further information, please contact the cited source.


Northwestern University   Original reporting by: Kristin Samuelson


Publication

Mathew AR et al. Cigarette smoking and depression comorbidity: systematic review & proposed theoretical model.   Addiction, Published Online September 15 2016. doi: 10.1111/add.13604


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