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Chantix Quick Reference Guide

Generic name

  • Varenicline

Date approved

  • May 2006


  • Pfizer, Inc.


  • On the market

Approved uses

  • Used as a smoking cessation aid or treatment

Serious side effects

  • Violent behavior
  • Suicidal behavior
  • Suicide
  • Depression
  • Constipation
  • Gas
  • Nausea


What is Chantix?

Chantix, manufactured by Pfizer, was the first nicotine receptor partial agonist—a smoking cessation drug—approved by the FDA.

Who takes it, and for what condition?

Smokers who are attempting to quit and who have not been successful using other methods take Chantix.

How does Chantix work?

Chantix blocks the body’s nicotine receptors, reducing nicotine cravings and the enjoyment of cigarettes.

Some Chantix patients reported that they experienced strange side effects, including erratic behavior, suicidal thoughts, and depression. In 2009, the FDA required Pfizer to place a Black Box Warning on the product explaining the risk of suicide and mental health problems.

What can you do?

If you or someone you love took Chantix and suffered from serious side effects, including mental health problems, suicidal thoughts, or suicidal behavior, you have valuable legal rights. Please call our toll-free number (1-888-341-1405) to discuss your case with one of our Chantix injury lawyers.

Trust our Massachusetts Chantix injury attorneys to help

Contact the Boston law firm of Thornton Law Firm LLP online or at 1-888-341-1405 for a free consultation with a recognized leader in Massachusetts drug and medical device litigation. You have nothing to risk. We offer a fair and accurate assessment of your case, and, perhaps, some hope.