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Updated: Nov 28, 2025

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
[Antibiotic stewardship - recent developments]
Winfried V Kern1, Stephan Horn1, Geertje Fink1
1Abteilung Infektiologie, Klinik für Innere Medizin II, Universitätsklinikum Freiburg.
Abstract:
Both in hospitals and outpatient settings, fewer fluoroquinolones have been prescribed in Germany in recent years. The consumption of cephalosporins also decreased somewhat in favor of penicillin derivatives. The aminoglycosides, which have only rarely been prescribed, can now be used again as a suitable alternative - but only parenterally - due to their relatively favorable activity and low resistance rates among typical urinary tract infection pathogens. In acute severe infection such as sepsis, addition, e. g. of tobramycin, to a suitable betalactam of a single dose has been discussed as a useful option, but the evidence for such a recommendation is weak. There is little news about the rational use of antibiotics in hematology-oncology patients. In the case of fever and neutropenia, the initial empirical regimens of choice remain piperacillin-tazobactam or a pseudomonas-active carbapenem as monotherapy. These betalactams should be given with extended infusion times, e. g. over 4 hours. Linezolid should be considered as a reserve drug and not be used empirically, but only in targeted therapy. With regard to an alleged penicillin allergy, the risk of true allergic reactions can be differentiated by careful taking of the history; on that ground patient subgroups can be defined that may be re-exposed without further allergological examinations.
Insights
Antibiotic prescribing in Germany shows a shift away from fluoroquinolones and cephalosporins towards penicillin derivatives. Aminoglycosides are re-emerging as viable options for urinary tract infections and severe sepsis, while specific guidelines exist for hematology-oncology patients.
Area of Science:
- Pharmacology
- Infectious Diseases
- Clinical Pharmacy
Background:
- Recent trends indicate a decrease in fluoroquinolone and cephalosporin use in German healthcare settings.
- Penicillin derivatives are increasingly favored, and aminoglycosides are being reconsidered for specific infections.
- Limited updates exist on antibiotic strategies for hematology-oncology patients, particularly concerning fever and neutropenia.
Purpose of the Study:
- To review current trends in antibiotic prescribing in Germany.
- To evaluate the re-emergence of aminoglycosides as therapeutic options.
- To discuss rational antibiotic use in hematology-oncology, including empirical and targeted therapies.
Main Methods:
- Analysis of antibiotic consumption data in hospital and outpatient settings.
- Review of current clinical guidelines and evidence for antibiotic use in specific patient populations.
- Discussion of antibiotic resistance patterns and therapeutic alternatives.
Main Results:
- Decreased prescription rates for fluoroquinolones and cephalosporins, with a rise in penicillin derivative use.
- Aminoglycosides show renewed utility for urinary tract infections and potentially sepsis due to favorable activity and low resistance.
- For fever and neutropenia in hematology-oncology, piperacillin-tazobactam or carbapenems remain first-line, with extended infusions recommended. Linezolid is a reserve drug.
- Careful patient history can identify subgroups suitable for re-exposure to penicillins despite alleged allergies.
Conclusions:
- Antibiotic prescribing patterns are evolving, necessitating updated therapeutic strategies.
- Aminoglycosides offer a valuable alternative in specific clinical scenarios.
- Evidence-based guidelines are crucial for optimizing antibiotic use, especially in immunocompromised patients.
- Accurate allergy assessment can safely expand penicillin use.
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