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What is Endo International and explain in detail?
Endo International plc is an American Irish-domiciled generics and specialty branded pharmaceutical company that generated over 93% of its 2017 sales from the U.S. healthcare system.  While Endos management, operations, and customers are almost exclusively U.S.–based, in 2013 Endo executed a corporate tax inversion to Ireland to avoid U.S. corporate taxes on their U.S. drug sales, and to avail of Irelands corporate tax system.

History and Acquisitions
Endo was created as a result of a management buyout from DuPont Merck in 1997 led by Carol Ammon.In 2009, Endo bought Indevus Pharmaceuticals to diversify into endocrinology and oncology