Cefazolin Injection (Brand Name: cefazoline; cephazolin; Ancef; Cefacidal) Patient’s weight: kilograms pounds Mild to moderate infections: 25 to 100 mg/kg/day IV/IM divided Q8H (Max 6 g/day) Severe infections: 100 to 150 mg/kg/day IV/IM divided Q8H (Max 12 g/day) Severe infections: 100 to 150 mg/kg/day IV/IM divided Q6H (Max 12 g/day)