Moxifloxacin Pharmacology

Real Life Pharmacology - Pharmacology Education for Health Care Professionals · Dec 4, 2025 · 14m

Moxifloxacin is a fourth-generation fluoroquinolone that works by inhibiting bacterial DNA gyrase and topoisomerase IV—two enzymes essential for DNA replication, repair, and transcription. By blocking both targets, it provides broad-spectrum activity against gram-positive, gram-negative, and atypical pathogens. Its enhanced gram-positive coverage, especially against Streptococcus pneumoniae, distinguishes it from earlier fluoroquinolones like ciprofloxacin.

Pharmacokinetically, moxifloxacin has excellent oral bioavailability, meaning the PO and IV doses are essentially interchangeable. It…