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Pfizer, the world's largest drugmaker, is paying $14.25 per share for King. That's a premium of 40% to the stock's Monday closing price of $10.15. As part of the deal, Pfizer will receive such products as Avinza and EpiPen, a pre-filled injection designed to quickly treat serious allergic reactions.
King also gives Pfizer access to the Flector pain patch and morphine pill Embeda. Pfizer has been looking to expand its pain products beyond the arthritis treatment Celebrex and nerve pain remedy Lyrica. King had $1.78 billion in revenue last year and is focused on making pain medications that patients can't abuse.
Pfizer needs new products to help offset revenue losses expected next year when generic copies of its top-selling drug, the Lipitor cholesterol pill, enter the market. Lipitor sales topped $11.4 billion last year.