What is the appropriate dosing regimen of ceftaroline fosamil for adults (including renal function adjustments) and pediatric patients?

Ceftaroline Fosamil Dosing

For adults with normal renal function, administer ceftaroline fosamil 600 mg intravenously every 12 hours as a 1-hour infusion; dosage adjustments are required for renal impairment and pediatric patients based on age and weight. 1

Adult Dosing

Standard Dosing (Normal Renal Function)

• 600 mg IV every 12 hours as a 1-hour infusion 1
• Alternative infusion duration: 5-60 minutes for standard doses 1
• For severe MRSA infections with MIC 2-4 mg/L: 600 mg IV every 8 hours as a 2-hour infusion 2

Renal Impairment Adjustments

Critical consideration: Ceftaroline is predominantly eliminated by glomerular filtration, making renal dose adjustments essential 1

• Mild impairment (CrCl >50 to ≤80 mL/min): No adjustment needed
• Moderate impairment (CrCl >30 to ≤50 mL/min): 400 mg IV every 12 hours 1, 3
• Severe impairment (CrCl ≥15 to ≤30 mL/min): 300 mg IV every 12 hours 1
• End-stage renal disease (CrCl <15 mL/min) including hemodialysis: 200 mg IV every 12 hours 1, 4

Hemodialysis timing: Administer after hemodialysis on dialysis days, as approximately 76.5 mg (21.6% of dose) is removed during a 4-hour session 1, 4

Geriatric Patients

• Use standard adult dosing adjusted for renal function 1
• Elderly patients (≥65 years) have ~33% higher AUC due to age-related renal changes 1
• Dosing should be based on creatinine clearance rather than age alone 1

Pediatric Dosing

Ages 2 Months to <18 Years

Weight-based dosing for normal renal function:

• Ages 2 months to <2 years: 8 mg/kg IV every 8 hours (maximum 400 mg per dose) 5
• Ages 2 to <18 years, ≤33 kg: 12 mg/kg IV every 8 hours (maximum 400 mg per dose) 5
• Ages 2 to <18 years, >33 kg: 400 mg IV every 8 hours OR 600 mg IV every 12 hours 5

Infusion duration: 5-60 minutes 5

Neonates (Birth to <2 Months, ≥34 Weeks Gestational Age)

• 6 mg/kg IV every 8 hours 5
• Approved for acute bacterial skin and skin structure infections 5

Pediatric Renal Impairment Adjustments

Ages ≥2 years to <18 years (≤33 kg):

• Moderate impairment: 8 mg/kg every 8 hours
• Severe impairment: 6 mg/kg every 8 hours
• End-stage: 5 mg/kg every 8 hours 6

Ages 2 months to <2 years:

• Moderate impairment: 5 mg/kg every 8 hours
• Severe impairment: 4 mg/kg every 8 hours
• End-stage: 3 mg/kg every 8 hours 6

Ages 0 to <2 months:

• Moderate impairment: 4 mg/kg every 8 hours
• Severe impairment: 3.5 mg/kg every 8 hours
• End-stage: 2.5 mg/kg every 8 hours 6

Special Populations

Hepatic Impairment

• No dosage adjustment required - ceftaroline does not undergo significant hepatic metabolism 1

Obesity

• Use total body weight for dosing calculations 1
• No specific adjustment needed beyond standard weight-based dosing

Gender and Race

• No dosage adjustments required based on gender or race 1

Administration Considerations

Preparation

• Reconstitute powder with appropriate diluent 1
• Final pH of constituted solution: 4.8-6.5 1

Monitoring

• Renal function: Monitor creatinine clearance, especially in elderly and renally impaired patients 1
• Clinical response: Assess within 48-72 hours of initiation
• Adverse events: Monitor for hypersensitivity reactions (rare anaphylaxis), infusion site complications 1

Drug Interactions

• Minimal interaction potential - not a substrate, inhibitor, or inducer of CYP450 enzymes 1
• No clinically significant interactions with drugs undergoing active renal secretion 1

Common Pitfalls

1. Failing to adjust for renal function: This is the most critical error - always calculate creatinine clearance before dosing
2. Incorrect hemodialysis timing: Must administer post-dialysis to avoid premature drug removal 4
3. Underdosing in obesity: Use actual body weight, not ideal body weight
4. Ignoring age-related renal decline: Elderly patients often require dose reduction even with "normal" serum creatinine