A new study suggests that Chantix, a drug used to help people quit smoking, should not be used as a first-line treatment for smoking cessation, due to the risk of serious adverse effects. Previous research showed a link between increased heart attack risk while using Chantix. This new study found that Chantix appears to increase the risk of suicidal behavior.
Carol Costello and Cristine Romans speak with CNN chief medical correspondent Dr. Sanjay Gupta to break down the study's findings.
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