<blockquote>They said Wyeth did this by obtaining fraudulent patents, engaging in sham litigation, and entering a price-fixing agreement with Teva to delay cheaper generic equivalents from reaching the market.

"As a result of defendants' exclusionary conduct, generic versions of Effexor XR were illegally blocked from the marketplace from June 2008 through at least June 2010," when U.S. sales of the drug topped $2.5 billion, the 78-page complaint said. Pfizer bought Wyeth in 2009.</blockquote>
via <a href="http://www.chicagobusiness.com/article/20111201/NEWS03/111209968/walgreen-others-sue-pfizer-teva-over-generic-anxiety-drug">Walgreen, others sue Pfizer, Teva over generic anxiety drug | Healthcare | Crain's Chicago Business</a>.