Shares of Regeneron Pharmaceuticals Inc. were halted in the extended session Thursday while shares of Amgen Inc. rallied after a federal judge said Regenron had to pull its competing cholestrol drug off the market as a penalty in a patent lawsuit. Regeneron shares were halted at $376.61, down 1.1% after hours, while shares of Amgen jumped 4.6% to $160. On Thursday, a federal judge blocked sales of Regeneron’s cholesterol treatment Praluent, stating that “irreparable harm” had been done to Amgen’s Repatha.
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