We here at the DDL Blog try to stay on top of the goings on at the FDA. We’ve learned that on September 14, 2016, the FDA will hold an advisory committee meeting to review the results of a recently completed, randomized, placebo-controlled clinical trial (Evaluating Adverse Events in a Global Smoking Cessation Study or “EAGLES”), as well as findings from other studies that have assessed the neuropsychiatric effects of Chantix (varenicline). See September 14, 2016: Joint Meeting of the Psychopharmacologic Drugs Advisory Committee and the Drug Safety and Risk Management Advisory Committee. The committee will consider whether data from these studies supports changing the Chantix product labeling, including potentially removing the boxed warning regarding serious neuropsychiatric events. The meeting comes approximately three years after Pfizer agreed to pay nearly $300 million to settle thousands of lawsuits filed by plaintiffs alleging that they experienced adverse neuropsychiatric effects while taking Chantix. See Pfizer 2012 Financial Report, at 107.
This chain of events seems to be a clear cut example of litigation marching ahead of the science, and at that cost, we thought we’d probe the situation a little deeper. Chantix was approved by FDA in May 2006. It was the first new smoking cessation medication to come to market in more than a decade, and was recognized at the time to be one of the most effective treatments available to help smokers break their addiction to nicotine. The following, year, however, a highly publicized incident involving a Texas musician named Carter Albrecht raised concerns about potential adverse neuropsychiatric effects of the medication. The musician, who was taking Chantix and was heavily intoxicated at the time, was shot and killed by a neighbor who thought that Mr. Albrecht was burglarizing his home. Mr. Albrecht’s girlfriend publicly blamed Mr. Albrecht’s behavior on his use of Chantix. The incident sparked national media attention, which led to an increasing number of anecdotal reports of patients experiencing neuropsychiatric events while taking Chantix.
Based largely on these anecdotal reports, the FDA instructed Pfizer to include warnings about potential neuropsychiatric effects in the Chantix product labeling, and, in July 2009, mandated the addition of a boxed warning. The boxed warning advised that patients being treated with Chantix should be monitored for neuropsychiatric symptoms “including changes in behavior, hostility, agitation, depressed mood, and suicide-related events, including ideation, behavior, and attempted suicide” and recommended stopping Chantix if any of these symptoms are observed. To further evaluate this issue, FDA also asked Pfizer to conduct a clinical trial—the recently completed EAGLES study—to assess the neuropsychiatric safety of Chantix.Continue Reading Chantix: A Lesson in Why Litigation Should Not Be Allowed to Get Ahead of Science