In Salix Pharmaceuticals, Ltd. v. Norwich Pharmaceuticals, Inc. 2023-1952 (Fed. Cir. April 11, 2024), this case involves appellate review of a district court’s findings regarding patent obviousness and infringement in Hatch-Waxman litigation. Specifically, the Federal Circuit reviewed the lower court’s obviousness analysis for dosage regimen and polymorph patent claims, as well as its interpretation of ANDA approval resetting provisions.Continue Reading Federal Circuit Upholds Rifaximin Patent Rulings, Affirms ANDA Approval Restrictions