What is the intravenous (IV) dose of Amoxicillin (amoxicillin)?

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Last updated: April 23, 2025View editorial policy

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From the Research

Amoxicillin-clavulanate is not typically administered intravenously, but when administered as an IV formulation, the dose should be 2.2 g every 6- or 8-hourly, as suggested by the most recent study 1.

Key Considerations

  • The IV formulation of amoxicillin-clavulanate is not commonly used, and instead, ampicillin-sulbactam (Unasyn) is used intravenously.
  • However, based on the study by 1, a dose of 2.2 g every 6- or 8-hourly may be considered in critically ill patients receiving renal replacement therapy.
  • It is essential to note that dosing should be adjusted for patients with renal impairment, with reduced frequency for creatinine clearance below 30 mL/min.
  • The medication combines a beta-lactam antibiotic (ampicillin) with a beta-lactamase inhibitor (sulbactam) to overcome bacterial resistance mechanisms.

Important Points to Consider

  • The IV route is used when oral therapy is not appropriate, such as in severe infections, inability to take oral medications, or when rapid therapeutic levels are needed.
  • Common indications include intra-abdominal infections, skin and soft tissue infections, pneumonia, and gynecological infections.
  • Monitor for allergic reactions, especially in patients with penicillin allergies.
  • The study by 1 highlights the need for careful consideration of antibiotic dose and frequency in critically ill patients receiving renal replacement therapy.

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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