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Ciprofloxacin penetration into extravascular spaces in a rabbit model
Abstract:
Ciprofloxacin penetration into extravascular spaces was studied in a rabbit Visking chamber model. The drug was administered (7 mg/kg) intramuscularly every 4 h for eight doses. Peak and trough drug levels by dose 8 were 1.3 and 0.35 micrograms/ml in serum and 0.61 and 0.50 micrograms/ml in extravascular sites. The ratio of extravascular site to serum free drug area under the drug curve by dose 8 was 91.1%. This potent, new antimicrobial agent appears to distribute freely to extravascular spaces in this animal model.
Insights
Ciprofloxacin effectively penetrates extravascular spaces in rabbits, reaching 91.1% of serum levels. This potent antimicrobial distributes freely, indicating broad efficacy in animal models.
Area of Science:
- Pharmacology
- Microbiology
- Drug Distribution Studies
Background:
- Ciprofloxacin is a potent fluoroquinolone antibiotic.
- Understanding drug penetration into extravascular tissues is crucial for optimizing antimicrobial therapy.
- The Visking chamber model allows for the study of drug diffusion into interstitial spaces.
Purpose of the Study:
- To investigate the penetration of ciprofloxacin into extravascular spaces.
- To quantify the ratio of extravascular to serum drug concentrations.
- To assess the distribution characteristics of ciprofloxacin in an animal model.
Main Methods:
- A rabbit Visking chamber model was utilized.
- Ciprofloxacin was administered intramuscularly at 7 mg/kg every 4 hours for eight doses.
- Serum and extravascular fluid drug levels were measured at peak and trough after the eighth dose.
Main Results:
- Peak serum ciprofloxacin levels were 1.3 µg/ml and trough levels were 0.35 µg/ml.
- Peak extravascular levels were 0.61 µg/ml and trough levels were 0.50 µg/ml.
- The ratio of extravascular to serum free drug area under the curve was 91.1% by dose 8.
Conclusions:
- Ciprofloxacin demonstrates significant penetration into extravascular spaces.
- The drug exhibits favorable distribution into tissues, suggesting potential for treating infections in these sites.
- This study supports the efficacy of ciprofloxacin in reaching target areas for antimicrobial action.