Novartis AG is buying from Takeda Pharmaceutical Co. Ltd. the dry eye therapy Xiidra (lifitegrast ophthalmic solution) for a $3.4 billion up-front payment, with up to $1.9 billion more if milestones are met, and the Basel, Switzerland-based firm is bringing aboard about 400 employees – mostly based in the U.S. and Canada – associated with the drug, which was approved by the FDA in the summer of 2016.