This article describes whistleblowing by a former Warner-Lambert employee, David Franklin,wrt Warner-Lambert's illegal marketing of Neurontin for medical uses that it was not good for. The U.S. government has successfully prosecuted Warner Lambert for this, but it was just a slap on the wrist to the giant drugmaker.
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http://www.usatoday.com/money/industries/health/drugs/2004-08-16-neurontin-cover_x.htm