Dose Optimization of Colistin: A Systematic Review

Area of Science:

• Pharmacology
• Infectious Diseases
• Critical Care Medicine

Background:

• Colistin is a vital last-resort antibiotic for multi-drug and extensively drug-resistant Gram-negative bacterial infections.
• Optimizing colistin dosing is essential to balance efficacy and minimize toxicity.
• Limited data exists on standardized colistin dosing strategies, particularly for specific patient populations.

Purpose of the Study:

• To systematically review and assess available data on colistin dosing strategies.
• To identify optimal colistin dosing regimens for improved patient outcomes.
• To evaluate the evidence supporting dose optimization in clinical practice.

Main Methods:

• A systematic review of published literature and grey matter was conducted.
• Included studies were assessed for quality using established tools (Newcastle-Ottawa, Cochrane bias tool, JBI checklist).
• Data from 19 studies (16 cohort, 1 RCT, 2 case reports) were analyzed, focusing on adult and pediatric dosing.

Main Results:

• The review identified 19 relevant studies, with a strong emphasis on adult populations (18 studies).
• A dosing regimen of a 9 million international units (MIU) loading dose followed by 4.5 MIU every 12 hours emerged as the most appropriate strategy.
• This regimen is recommended for optimizing colistin's safety and efficacy in treating severe infections.

Conclusions:

• The findings support the use of a loading dose followed by a maintenance dose of colistin for severe and life-threatening Gram-negative bacterial infections.
• This optimized dosing strategy is crucial for enhancing treatment effectiveness and improving clinical outcomes.
• Further research may be needed to refine pediatric dosing guidelines based on limited available data.