Pfizer to buy Allergan in $160 bln deal to create No. 1 drugmaker
November 23, 2015 at 07:11 AM EST
Nov 23 (Reuters) - 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, creating the world's biggest drugmaker.