[8] In April 2007, Eisai acquired Exton, Pennsylvania-based Morphotek, a company developing therapeutic monoclonal antibodies for the treatment of cancer, rheumatoid arthritis, and infectious diseases.

In December 2007, Eisai acquired MGI Pharma, a company specializing in oncology, for US$3.9 billion.

[9] This event brought Dacogen (decitabine), Aloxi (palonosetron), Hexalen (altretamine) for ovarian cancer, and the Gliadel Wafer (carmustine) for brain tumors into the Eisai product portfolio.

In 2009, Eisai received the Corporate Award from the National Organization for Rare Disorders (NORD) for the development of Banzel (rufinamide).

[17] Eisai has pursued development of alternative formulations in order to extend the marketable lifetime of the product.