Pfizer to buy Allergan in $160 billion deal

November 23, 2015 12:31 PM

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Pfizer Inc, the maker of Viagra and Lipitor, has struck a deal to buy Botox-maker Allergan Plc in a transaction valued at about $160 billion.

The complex deal, the biggest ever in the healthcare sector, will allow Pfizer to shift its legal base to Ireland in a so-called "inversion" that would reduce its tax rate.

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