Pfizer toughens Chantix label on depression
Based upon post-marketing reports first reflected in a November 2007 labeling update, global drug giant Pfizer updated the labeling of its smoke-cessation drug Chantix (varenicline) in the USA to include a warning that patients who are attempting to quit smoking with the product should be observed for serious neuropsychiatric symptoms, including changes in behavior, agitation, depressed mood, suicidal ideation and suicidal behavior.
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