Cefepime Reconstitution and Administration Guide
Administer cefepime intravenously over approximately 30 minutes at doses ranging from 0.5-2 g every 8-12 hours depending on infection severity, with mandatory dose adjustments for creatinine clearance ≤60 mL/min. 1
Standard Dosing for Normal Renal Function (CrCL >60 mL/min)
Adult Dosing by Indication
- Moderate to severe pneumonia: 1-2 g IV every 8-12 hours for 10 days
- For Pseudomonas aeruginosa, use 2 g IV every 8 hours 1
- Febrile neutropenia: 2 g IV every 8 hours for 7 days or until neutropenia resolves 1
- Mild to moderate UTI/pyelonephritis: 0.5-1 g IV every 12 hours for 7-10 days
- Severe UTI/pyelonephritis: 2 g IV every 12 hours for 10 days
- Skin and soft tissue infections: 2 g IV every 12 hours for 10 days
- Complicated intra-abdominal infections (with metronidazole): 2 g IV every 8-12 hours for 7-10 days 1
Pediatric Dosing (2 months to 16 years, ≤40 kg)
- Standard dose: 50 mg/kg every 12 hours
- Moderate to severe pneumonia due to P. aeruginosa: 50 mg/kg every 8 hours
- Febrile neutropenia: 50 mg/kg every 8 hours
- Maximum dose should not exceed adult dosing 1
Critical caveat: Do not use cefepime in pediatric patients <2 months old or for suspected/documented meningitis—use an alternative agent with proven CNS efficacy 1
Administration Details
Infusion Rate and Preparation
- Standard infusion time: 30 minutes 1
- Extended infusion: 3-hour infusions may optimize pharmacodynamics, particularly for resistant organisms 2, 3
- For premixed Galaxy containers: Thaw at room temperature (25°C) or refrigeration (5°C)—never force thaw with water baths or microwave 1
- Inspect visually for particulate matter and discoloration before administration 1
Compatible IV Fluids
Important compatibility warning: Recent data shows cefepime has limited physical compatibility with common IV fluids:
- Cefepime at concentrations of 10-40 mg/mL is physically incompatible with 0.45% sodium chloride, Ringer's lactate, and Plasma-Lyte A beyond 1 hour 4
- This means cefepime should be administered separately or through a dedicated line when using these fluids
Renal Dose Adjustments (Mandatory)
This is where most errors occur—cefepime accumulation in renal impairment causes neurotoxicity including encephalopathy, myoclonus, and seizures. 1
Dosing by Creatinine Clearance
For standard 2 g every 8-hour regimen:
| CrCL (mL/min) | Adjusted Dose |
|---|---|
| >60 | 2 g every 8 hours (no adjustment) |
| 30-60 | 2 g every 12 hours |
| 11-29 | 2 g every 24 hours |
| <11 | 1 g every 24 hours |
| CAPD | 2 g every 48 hours |
| Hemodialysis | 1 g on day 1, then 1 g every 24 hours (give after dialysis) [1] |
Key point: Hemodialysis removes approximately 68% of cefepime during a 3-hour session, so always dose after dialysis 1, 5
Use Cockcroft-Gault equation to estimate CrCL when only serum creatinine is available 1
Special Populations Requiring Dose Modification
- Critically ill patients with augmented renal clearance (ARC): Standard dosing may be inadequate. Consider 1 g every 4 hours instead of 2 g every 8 hours to maintain bactericidal concentrations 6
- CRRT patients: Optimal dosing is 2 g loading dose followed by 1.5-1.75 g every 8 hours (higher than most clinical resources recommend) 7
- Elderly patients: More likely to have decreased renal function—monitor CrCL closely and adjust accordingly 1
Therapeutic Drug Monitoring
Consider TDM in critically ill patients, life-threatening infections, or infections with resistant pathogens to ensure adequate exposure while avoiding neurotoxicity 8, 2
Target Concentrations
- Trough concentration (Cmin): 5-20 mg/L
- Maximum safe trough: <20 mg/L to avoid neurotoxicity
- Steady-state concentration (Css) for continuous infusion: 5-35 mg/L, maximum <35 mg/L 8
- Pharmacodynamic target: Free drug concentration >4× MIC for ≥70% of dosing interval 8, 2
For CNS infections with external ventricular drains, CSF sampling for TDM may be considered to ensure adequate CNS penetration (target: CSF concentration >MIC) 8
Storage
- Premixed frozen solutions: Store frozen until ready to use
- Once thawed: Use immediately; do not refreeze 1
- Check for leaks by squeezing container—discard if leaks detected 1
Critical Safety Warnings
- Neurotoxicity risk: Highest in elderly patients with renal impairment receiving unadjusted doses. Symptoms include encephalopathy, confusion, hallucinations, myoclonus, seizures, and coma 1
- Do not add supplementary medications to premixed containers 1
- Protein binding is only 20%, making cefepime highly dialyzable and requiring post-dialysis dosing 2, 5
- Renal function monitoring: Essential in elderly patients and those with changing renal status 1