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FDA: Pfizer Inc. (PFE)'s Chantix (Varenicline) May Increase the Risk of Certain Cardiovascular Adverse Events in Patients with Cardiovascular Disease


6/16/2011 8:36:11 AM

The U.S. Food and Drug Administration (FDA) is notifying the public that the smoking cessation aid Chantix (varenicline) may be associated with a small, increased risk of certain cardiovascular adverse events in patients who have cardiovascular disease. This safety information will be added to the Warnings and Precautions section of the Chantix physician labeling. The patient Medication Guide will also be revised to inform patients about this possible risk.

FDA reviewed a randomized clinical trial of 700 smokers with cardiovascular disease who were treated with Chantix or placebo (see Data Summary below). In this trial, Chantix was effective in helping patients quit smoking and remain abstinent from smoking for as long as one year. Cardiovascular adverse events were infrequent overall, however, certain events, including heart attack, were reported more frequently in patients treated with Chantix than in patients treated with placebo.

Healthcare professionals should be aware that smoking is an independent and major risk factor for cardiovascular disease, and smoking cessation is of particular importance in this patient population. The known benefits of Chantix should be weighed against its potential risks when deciding to use the drug in smokers with cardiovascular disease.

Patients taking Chantix should contact their healthcare professional if they experience new or worsening symptoms of cardiovascular disease.

FDA is continuing to evaluate the cardiovascular safety of Chantix and is requiring the manufacturer to conduct a large, combined analysis (meta-analysis) of randomized, placebo-controlled trials. FDA will update the public when additional information is available.


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