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Related Experiment Videos

Levofloxacin, a second-generation fluoroquinolone

D S North1, D N Fish, J J Redington

  • 1Pharmacy Service, Denver VA Medical Center, Colorado 80220, USA.

Pharmacotherapy
|October 3, 1998
PubMed
Summary

Levofloxacin offers an extended spectrum of activity, including improved efficacy against gram-positive bacteria and atypical organisms. This fluoroquinolone antibiotic demonstrates impressive clinical effectiveness for various infections and is generally well-tolerated.

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Area of Science:

  • Pharmacology
  • Infectious Diseases
  • Microbiology

Background:

  • Levofloxacin is a fluoroquinolone antibiotic approved in 1996.
  • It presents an extended spectrum of activity compared to older fluoroquinolones.
  • Levofloxacin exhibits enhanced efficacy against Gram-positive bacteria and atypical organisms.

Purpose of the Study:

  • To evaluate the efficacy and safety of levofloxacin.
  • To compare levofloxacin's activity with older fluoroquinolones.
  • To assess levofloxacin's pharmacokinetic profile.

Main Methods:

  • Clinical studies were conducted to assess efficacy in various infections.
  • Pharmacokinetic parameters were analyzed, including bioavailability and elimination.
  • Adverse events and drug interactions were monitored.

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Main Results:

  • Levofloxacin demonstrated impressive efficacy in community-acquired pneumonia, bronchitis exacerbations, sinusitis, skin infections, and urinary tract infections.
  • The oral bioavailability of levofloxacin is nearly 100%, with a plasma elimination half-life of 6-8 hours.
  • Adverse events were similar to other fluoroquinolones, primarily gastrointestinal and central nervous system effects. Drug interactions are uncommon, but absorption is reduced by antacids or cation-containing agents.

Conclusions:

  • Levofloxacin is an effective antibiotic for treating a range of bacterial infections, including those caused by penicillin-resistant pneumococci.
  • Its pharmacokinetic profile and tolerability support its use in clinical practice.
  • Levofloxacin offers an improved therapeutic option compared to older fluoroquinolones.