Mallinckrodt plc (NYSE:MNK), a leading global specialty pharmaceuticals company, acquires Questcor Pharmaceuticals, Inc. (NASDAQ: QCOR) in a transaction valued at approximately $5.8 billion. VISCHER represents Mallinckrodt in Swiss law matters in connection with the Rule 144A offering of $900,000,000 aggregate principal amount of 5.75% Senior Notes due 2022 by Mallinckrodt International Finance S.A. and Mallinckrodt CB LLC. Barclays, Deutsche Bank Securities, Citigroup, and Wells Fargo Securities act as joint book-running managers and the co-managers. The Vischer team is lead by Matthias Staehelin and Adrian Dörig (both Corporate), Christoph Niederer (Tax) and includes Marius Meier and Janusz Marty.