Piperacillin(Pipracin, Pipril) IV Piperacillin (Pipracin, Pipril) 4g X 4/d CrCl > 40 mL/min 4g X3/d CrCl 20-40 mL/min 4gX2/d CrCl< 20 mL/min 2g X 3/d + 1g AD Pediatric dose 100 mg/kg q 6 hours Age>28 days