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When and How to Use Subcutaneous Antibiotics.

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Subcutaneous antibiotic infusion offers a viable alternative to intravenous therapy, especially for patients with difficult venous access. This method achieves therapeutic antibiotic levels comparable to IV administration for certain drug classes.

Keywords:
intravenous-to-subcutaneous switch; antimicrobial delivery systemsoutpatient parenteral antimicrobial therapy (OPAT)pharmacokinetics/pharmacodynamics (PK/PD)subcutaneous antibiotic administration

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Area of Science:

  • Infectious Diseases
  • Clinical Pharmacology
  • Nursing

Background:

  • Subcutaneous (SC) antibiotic administration is an emerging alternative to intravenous (IV) therapy.
  • It is beneficial for patients with poor venous access, frail individuals, and in outpatient or palliative settings.
  • Oral administration is not always feasible, necessitating alternative routes.

Purpose of the Study:

  • To review the clinical experience, pharmacokinetic/pharmacodynamic (PK/PD) data, and technical aspects of SC antibiotic infusion.
  • To evaluate the efficacy and tolerability of SC antibiotics compared to IV administration.
  • To provide guidance for healthcare professionals on utilizing SC antibiotic therapy.

Main Methods:

  • Multidisciplinary review of current clinical experience.
  • Analysis of available pharmacokinetic/pharmacodynamic (PK/PD) data for various antibiotic classes.
  • Summary of technical considerations for SC infusion.

Main Results:

  • SC delivery of time-dependent antibiotics (e.g., beta-lactams, glycopeptides) achieves therapeutic PK/PD targets comparable to IV administration.
  • SC daptomycin shows favorable exposure and target attainment with good tolerability.
  • Limited PK/PD benefits for concentration-dependent antibiotics (e.g., aminoglycosides, fluoroquinolones) due to reduced peak levels and potential local toxicity.

Conclusions:

  • Subcutaneous antibiotic infusion is a safe and effective alternative route for specific antibiotics and patient populations.
  • It offers comparable therapeutic outcomes to IV therapy for certain drug classes, with improved patient convenience and reduced complications.
  • Further research and regulatory frameworks are needed to expand the use of SC antibiotic administration.