RALEIGH, N.C.--(BUSINESS WIRE)--Salix Pharmaceuticals, Ltd. (NASDAQ:SLXP) today announced that the United States Patent and Trademark Office has issued U.S. Patent No. 7,718,608. This patent provides protection until August 2019 for rifaximin, which Salix markets in the United States under the trade names XIFAXAN® (200mg) and XIFAXAN550™ (550mg).
