In a long and winding regulatory road that began with two complete response letters 15 years ago, Allschwil, Switzerland-based Basilea Pharmaceutica Ltd. finally gained U.S. FDA approval of its intravenous cephalosporin antibiotic, Zevtera (ceftobiprole medocaril sodium), to treat Staphylococcus aureus bacteremia, acute bacterial skin and skin structure infections (ABSSSI) and community-acquired bacterial pneumonia.