Antibiotic adverse reactions and drug interactions
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Updated: Jul 6, 2026

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations
Published on: July 24, 2021
Eric V Granowitz1, Richard B Brown
1Infectious Disease Division, Baystate Medical Center, Tufts University School of Medicine, 759 Chestnut Street, Springfield, MA 01199, USA.
Abstract:
When contemplating antibiotic use, intensivists must consider possible beneficial and harmful drug interactions. After antibiotics are instituted, adverse reactions must be anticipated. Acute illness, comorbidities, and concurrent medications affect the presentation and management of antibiotic-related adverse events. Intensivists should use the fewest possible antibiotics, carefully choosing agents that maximize antimicrobial activity and minimize potential drug interactions and adverse reactions.
Insights
Intensivists must carefully consider antibiotic drug interactions and adverse reactions. Minimizing antibiotic use and choosing agents wisely can improve patient safety in critical care settings.
Area of Science:
- Critical Care Medicine
- Pharmacology
- Infectious Diseases
Background:
- Antibiotic selection in intensive care units (ICUs) requires careful consideration of potential drug interactions.
- Adverse drug events (ADEs) associated with antibiotic therapy are a significant concern in critically ill patients.
- Patient factors like acute illness, comorbidities, and concomitant medications influence the occurrence and management of antibiotic-related ADEs.
Purpose of the Study:
- To highlight the importance of anticipating and managing antibiotic-related adverse events in the ICU.
- To emphasize the need for judicious antibiotic use among intensivists.
- To guide the selection of antibiotics that balance efficacy with minimized risks of interactions and adverse reactions.
Main Methods:
- This review synthesizes current knowledge on antibiotic drug interactions and adverse reactions in critically ill patients.
- It examines factors influencing the presentation and management of these events.
- The focus is on clinical considerations for intensivists.
Main Results:
- Antibiotic use in ICUs is complex, with numerous potential beneficial and harmful drug interactions.
- Adverse reactions to antibiotics must be proactively anticipated after initiation of therapy.
- The interplay of acute illness, comorbidities, and concurrent medications complicates the management of antibiotic-related adverse events.
Conclusions:
- Intensivists must be vigilant regarding antibiotic drug interactions and potential adverse reactions.
- Judicious antibiotic stewardship, including using the fewest effective agents, is crucial.
- Careful selection of antibiotics is essential to maximize antimicrobial efficacy while minimizing drug interactions and adverse events in critical care.
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