In 2004, Pfizer's Warner-Lambert unit pleaded guilty to felony charges that it promoted Neurontin for uses not approved by the Food and Drug Administration, including bipolar disorder and chronic nerve pain. The FDA originally approved the drug as an antiseizure treatment for epilepsy and in 2002 for one kind of pain related to shingles.
Pfizer paid $430 million to resolve the charges and reimburse state Medicaid programs for unapproved, or off-label, uses of Neurontin. Pfizer said it made sure there was no improper marketing after it purchased Warner-Lambert in 2000. Pfizer has booked about $12 billion in Neurontin sales since then and, though the drug is now subject to generic competition, it remains a strong seller.
Documents and emails released this week in the case in U.S. District Court in Boston suggest Pfizer's marketers influenced the drug's scientific record to boost sales at least until 2003 by declining to release or altering the conclusions of studies that found no beneficial effect from Neurontin for various off-label conditions. The case consolidates lawsuits by health insurers and consumers seeking refunds for their Neurontin expenditures, based on alleged civil fraud. Plaintiffs are seeking $4.9 billion.
In a statement, Pfizer said it was "committed to the communication of medically or scientifically significant results of all studies, regardless of outcome." The company pointed to examples where it published studies of Neurontin with negative outcomes.