What is the recommended dosing of cefepime for urinary tract infections (UTI) in patients with impaired renal function?

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Cefepime Dosing for UTI in Patients with Impaired Renal Function

For patients with impaired renal function, cefepime dosing for UTI should be adjusted based on creatinine clearance, with 500 mg every 24 hours for CrCl 11-29 mL/min and 250 mg every 24 hours for CrCl less than 11 mL/min. 1

Dosing Recommendations Based on Renal Function

The FDA-approved cefepime dosing for UTI varies by severity and renal function:

Normal Renal Function (CrCl > 60 mL/min):

  • Mild to moderate uncomplicated/complicated UTI: 0.5-1 g IV every 12 hours for 7-10 days
  • Severe uncomplicated/complicated UTI: 2 g IV every 12 hours for 10 days 1

Impaired Renal Function:

Creatinine Clearance Mild-Moderate UTI (500 mg q12h) Severe UTI (2 g q12h)
30-60 mL/min 500 mg every 24 hours 2 g every 24 hours
11-29 mL/min 500 mg every 24 hours 1 g every 24 hours
<11 mL/min 250 mg every 24 hours 500 mg every 24 hours
CAPD 500 mg every 48 hours 2 g every 48 hours
Hemodialysis 1 g on day 1, then 500 mg q24h 1 g every 24 hours

1

Special Considerations for Dialysis Patients

Hemodialysis:

  • Approximately 68% of cefepime is removed during a 3-hour dialysis session
  • Administer cefepime following hemodialysis on dialysis days
  • Recommended dose: 1 g on day 1, then 500 mg every 24 hours 1, 2

Continuous Ambulatory Peritoneal Dialysis (CAPD):

  • Administer 500 mg every 48 hours for mild-moderate UTI
  • Administer 2 g every 48 hours for severe UTI 1

Calculating Creatinine Clearance

When only serum creatinine is available, use the Cockcroft-Gault equation to estimate creatinine clearance:

  • Males: CrCl (mL/min) = Weight (kg) × (140 – age) / (72 × serum creatinine [mg/dL])
  • Females: CrCl (mL/min) = 0.85 × male value 1

Duration of Treatment

  • Mild to moderate uncomplicated/complicated UTI: 7-10 days
  • Severe uncomplicated/complicated UTI: 10 days 1

Monitoring Recommendations

  • Assess clinical response within 48-72 hours and adjust therapy based on culture results 3
  • For dialysis patients, monitor drug levels according to local policy thresholds 3
  • Be aware of drug accumulation between dialysis sessions 3
  • Consider timing of antibiotic administration relative to dialysis sessions 3

Clinical Efficacy

Cefepime has demonstrated high efficacy in the treatment of UTIs, with clinical response rates of 89-92% and bacterial eradication rates of 85% in both complicated and uncomplicated UTIs 4.

Potential Pitfalls and Caveats

  • Avoid using standard dosing regimens in dialysis patients, as dialysis significantly alters drug clearance 3
  • The National Kidney Foundation advises against relying on creatinine-based equations to estimate renal function in dialysis patients 3
  • Consider obtaining urine culture before initiating antibiotics 3
  • Consider blood cultures if the patient shows signs of systemic infection/sepsis 3
  • Most common adverse events include headache, diarrhea, and vomiting 4

References

Research

Cefepime clinical pharmacokinetics.

Clinical pharmacokinetics, 1993

Guideline

Management of Urinary Tract Infections

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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