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Levofloxacin does not alter cyclosporine disposition
D R Doose1, S A Walker, S C Chien
1R. W. Johnson Pharmaceutical Research Institute, Spring House, Pennsylvania 19477-0776, USA.
Journal of Clinical Pharmacology
|May 23, 1998
Summary
This study found that levofloxacin does not significantly alter cyclosporine pharmacokinetics in healthy subjects. Therefore, concurrent administration of levofloxacin and cyclosporine is unlikely to cause a clinically significant drug interaction.
Area of Science:
- Pharmacology
- Drug Interactions
- Clinical Pharmacokinetics
Background:
- Fluoroquinolone antibiotics can increase serum concentrations of the immunosuppressant drug cyclosporine.
- Understanding potential interactions is crucial for safe co-administration of medications.
Purpose of the Study:
- To investigate the pharmacokinetic interaction between levofloxacin and cyclosporine.
- To determine if levofloxacin affects cyclosporine absorption, distribution, metabolism, or excretion.
Main Methods:
- A randomized, double-blind, placebo-controlled, crossover study involving 12 healthy subjects.
- Subjects received a single oral dose of cyclosporine during levofloxacin or placebo treatment.
- Cyclosporine serum concentrations were monitored for 48 hours post-dose for pharmacokinetic analysis.
Main Results:
- Key pharmacokinetic parameters for cyclosporine, including AUC and Cmax, were comparable between the levofloxacin and placebo phases.
- No statistically significant differences were observed in cyclosporine pharmacokinetics when co-administered with levofloxacin.
Conclusions:
- Levofloxacin does not appear to cause a clinically significant pharmacokinetic interaction with cyclosporine.
- Concurrent therapy with levofloxacin and cyclosporine is likely safe from a pharmacokinetic interaction perspective.