Pfizer Inc. has recently seen how sales of its biggest-selling drug, anti-cholesterol medication Lipitor, started falling when it had to compete with cheaper generic versions. The pharmaceutical giant was determined not to let that happen to its number-two cash cow, anti-pain and seizure drug Lyrica.

On July 18, Pfizer turned aside a challenge from eight generic drug companies seeking to invalidate three patents relating to Lyrica. The patents, which were held by Northwestern University, had been granted to Pfizer under an exclusive license. Led by Teva Pharmaceutical Industries Ltd., the world’s largest generic-drug manufacturer, the challengers had hoped to make cheaper versions of the drug immediately, and had filed abbreviated new drug applications with the Federal Drug Administration. White & Case and Morris, Nichols, Arsht & Tunnell represented Pfizer, while McCarter & English represented Northwestern. Teva, meanwhile, was represented by Kenyon & Kenyon.

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