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Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
Management of aminoglycosides in the intensive care unit
Elizabeth A Radigan1, Neil A Gilchrist, Melissa A Miller
1Department of Pharmacy, Infectious Diseases, UMass Memorial Medical Center, Worcester, MA 01655, USA. elizabeth.radigan@umassmemorial.org
Abstract:
Antibacterial resistance is increasing throughout the world, while the development of new agents is slowly progressing. In addition, the increasing prevalence of fluoroquinolone resistance may force many practitioners to choose an aminoglycoside agent in gram-negative regimens. Aminoglycosides are bactericidal agents with potent activity against gram-negative infections and activity against gram-positive infections when added to a cell wall active antimicrobial-based regimen. These agents may be dosed multiple times a day or consolidated as high-dose, extended-interval dosing to maximize pharmacokinetic and pharmacodynamic properties to achieve possible improved efficacy with reduced toxicity. Clinical application includes the treatment of bacteremia, endocarditis, health-care and nosocomial pneumonias, intra-abdominal infections, and others. Nephrotoxicity and ototoxicity are potential risks of aminoglycoside therapy that may be minimized with serum monitoring and short courses of therapy.
Insights
Aminoglycosides are crucial bactericidal agents for treating gram-negative infections, especially with rising fluoroquinolone resistance. Optimizing dosing strategies can enhance efficacy and minimize risks like nephrotoxicity and ototoxicity.
Area of Science:
- Pharmacology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Increasing global antibacterial resistance necessitates alternative treatment strategies.
- Rising fluoroquinolone resistance may increase reliance on aminoglycosides for gram-negative infections.
Purpose of the Study:
- To review the role and optimal use of aminoglycosides in treating bacterial infections.
- To discuss dosing strategies and potential toxicities associated with aminoglycoside therapy.
Main Methods:
- Literature review of aminoglycoside pharmacology, clinical applications, and toxicity.
- Analysis of dosing strategies, including multiple daily dosing and high-dose, extended-interval dosing.
Main Results:
- Aminoglycosides exhibit potent bactericidal activity against gram-negative pathogens.
- They can be effective against gram-positive infections when combined with cell wall active agents.
- Optimized dosing aims to improve pharmacokinetic/pharmacodynamic properties, potentially increasing efficacy and reducing toxicity.
Conclusions:
- Aminoglycosides remain vital for treating various severe infections, including bacteremia and pneumonia.
- Careful serum monitoring and judicious use are essential to mitigate nephrotoxicity and ototoxicity.
- Dosing optimization is key to maximizing the therapeutic benefit of aminoglycosides.
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