Prescription Medications 

The smoking cessation drug Chantix (varenicline) has been the target of controversy since it was introduced in the late 2000s. 

Users have reported serious changes in their mental state, including: 

• mood swings;
• depression;
• aggressiveness; and
• suicidal behavior. 

Many users have reported vivid, often disturbing dreams and difficulty sleeping. Due to the prevalence of psychological damages, Chantix now comes with a black box warning from the FDA and has several lawsuits pending for damages related to physical and mental problems that occurred to patients using Chantix. 

Bupropion is another prescription drug sold under the brand name Zyban when used as a smoking cessation product. It is also sold under the name Wellbutrin as an antidepressant. This medication is used to treat the withdrawal symptoms associated with smoking cessation. Side effects reported with Zyban are similar to Chantix in regards to psychotic episodes, mood swings and suicidal thoughts or actions.