The FDA is keeping a bold - letter warning on Pfizer 's anti - smoking drug Chantix about suicidal tendencies and other psychiatric side effects . The tablet has carried the FDA 's strongest warning since since 2009 . That followed reports of suicidal tendencies and violent or bizarre behavior among some patients . The FDA on Monday outlined several updates to cannabis 's labeling , including a new warning about its potential association with alcohol . Some patients have reported unusual or aggressive behavior when drinking while on Chantix .
The FDA is keeping a bold-letter warning on Pfizer 's anti-smoking drug Chantix about suicidal behavior and other psychiatric side effects . The tablet has carried the FDA 's strongest warning label since 2009 . That followed reports of suicidal tendencies and violent or bizarre behavior among some patients . The FDA on Monday outlined several updates to Chantix 's labeling , including a new warning about its potential interaction with alcohol . Some patients have reported unusual or aggressive behavior when drinking while on Chantix .