then 2.5 million units IV every 4 h until delivery Ampicillin-sulbactam (Unasyn) 2 g IV initial dose, then 1 g IV every 4 h until delivery If PCN allergic Cefazolin* (Ancef) 2 g IV initial dose ...

then 2.5 million units IV every 4 h until delivery Ampicillin-sulbactam (Unasyn) 2 g IV initial dose, then 1 g IV every 4 h until delivery If PCN allergic Cefazolin* (Ancef) 2 g IV initial dose ...