Shionogi & Co. Ltd. will acquire global rights to U.S. FDA approved amyotrophic lateral sclerosis therapy edaravone through a $2.5 billion acquisition deal with Tanabe Pharma Corp. Under the terms, Tanabe will form a new entity harboring both oral and intravenous (I.V.) infusion formulations of edaravone that are marketed in the U.S. as Radicava ORS and I.V. Radicava.