
Health & Wellness
The Food and Drug Administration said it has received reports of 37 suicides and more than 400 of suicidal behavior in connection with the drug. In November, the agency began investigating reports of depression, agitation and suicidal behavior among patients taking the popular twice-daily pill.
The agency's announcement comes two weeks after Pfizer added stronger warnings to the drug. In doing so, the company stressed that a direct link between Chantix and the reported psychiatric problems has not been established, but could not be ruled out.
Pfizer suggested that since nicotine withdrawal alone can cause mood swings and agitation, it may be impossible to determine if Chantix aggravates those behaviors.
But FDA said it found evidence of Chantix patients who experienced psychiatric problems even though they were still smoking.
"There are a number of compelling cases that look like they are the result of exposure to the drug itself and not other causes," said Bob Rappaport, a director at FDA's drug evaluation center. Some patients experienced the same psychiatric problems after they stopped using Chantix, he said, suggesting a negative reaction to withdrawal.
In a public advisory released Friday, FDA said patients taking Chantix should tell their doctor about any history of mental illness. Patients and family members should watch for any changes in mood and behavior.
"Chantix may cause worsening of current psychiatric illness even if it is currently under control," reads the statement. "It may also cause an old psychiatric illness to reoccur."
FDA noted that patients with psychiatric problems were not included in the original studies used to test Chantix's safety.
Approved in May 2006, Chantix, already prescribed 4 million times in the U.S., has been one of the few bright spots on Pfizer's balance sheet. For full-year 2007, the drug had sales of $883 million, helping offset lower sales of older drugs, such as the antidepressant Zoloft, which face generic competition.
The tablets work by binding to nicotine receptors in the brain, reducing the symptoms of withdrawal.
GlaxoSmithKline makes Zyban, the only other non-nicotine, anti-smoking drug for sale in the U.S. Part of the antidepressant drug class, Zyban includes warnings about increased suicidal behavior.
Shares of Pfizer Inc. rose 23 cents to close at $23.59 Friday.
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Quote of the Day
People who shut their eyes to reality simply invite their own destruction, and anyone who insists on remaining in a state of innocence long after that innocence is dead turns himself into a monster.
Recent Comments
Technically speaking it's not an airbase but a squat. Yanks were asked to leave by the Iraqis but refuse to do so. Which means they're hardly in a...
Such Turkish nonsense. Turkey has been a major violator of human rights for many decades. And in the last several years Erdogan has arrested and...
Well spoke Joyly. Let us all remember that on of the hardest things too do is forgive yourself.
Just curious. Why would the pope choose this time in history to visit Iran? Does that seem a bit strange, with all the scamdemic stuff on?
Again, it is NOT a vaccine. Just sayin'.