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The FTC authorized a lawsuit to block CSL Limited’s proposed $3.1 billion acquisition of Talecris Biotherapeutics Holdings Corporation, charging that the deal would would substantially reduce competition in the U.S. markets for four plasma-derivative protein therapies – Immune globulin (Ig), Albumin, Rho-D, and Alpha-1. These therapies are used to treat patients suffering from illnesses such as primary immunodeficiency diseases, chronic inflammatory demyelinating polyneuropathy, alpha-1 antitrypsin disease, and hemolytic disease of the newborn. In approving the administrative complaint seeking to block the deal, the Commission also authorized the staff to seek a preliminary injunction in federal district court in Washington, D.C., to stop the transaction pending completion of the administrative trial.  Following the FTC's lawsuit to block the transaction, CSL Limited announced that it would not proceed with its proposed acquisition.

In December 2008, the Commission settled antitrust concerns raised by the proposed $8.9 billion acquisition of Barr Pharmaceuticals by Teva Pharmaceutical Industries. The proposed acquisition would have lessened competition in the markets for 17 commonly used generic medications including drugs used in the treatment of cancer, bacterial infections, diabetes, acid reflux, and depression as well as several varieties of oral contraceptives. According to the Commission’s complaint, the acquisition would have likely led to higher prices for consumers through the removal of one of only four competitors in each of these markets. The Commission’s consent agreement requires both Teva and Barr to sell assets in 29 U.S. markets to either Watson Pharmaceuticals or Qualitest Pharmaceuticals.

In late 2008, the Commission issued a consent order to restore competition in the market for oral long-acting opioids (LAOs). The FTC intervened in King Pharmaceutical’s proposed $1.6 billion acquisition of rival drug-maker Alpharma Inc. because the transaction would have joined the two leading producers of morphine sulfate oral LAO’s in the United States, a market which was already highly concentrated and which had annual sales of $4 billion in 2007. In order to maintain competition in the market, the Commission’s consent order requires King to divest its Kadian business to Actavis, a company which already manufactured the drug for King, and which could then produce a generic equivalent of the drug sooner than would have been permitted under King’s patent, which would not have expired until 2010.