🦠microbiology review

Moxifloxacin

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Moxifloxacin is a broad-spectrum fluoroquinolone antibiotic used to treat various bacterial infections, including those of the urinary system. It works by inhibiting bacterial DNA gyrase and topoisomerase IV enzymes, preventing bacterial replication.

5 Must Know Facts For Your Next Test

  1. Moxifloxacin is effective against both Gram-positive and Gram-negative bacteria.
  2. It is often reserved for cases where other antibiotics are ineffective due to its broad spectrum and potential side effects.
  3. This antibiotic can be administered orally or intravenously, depending on the severity of the infection.
  4. Common side effects include gastrointestinal disturbances, such as nausea and diarrhea, and potential tendon damage.
  5. Moxifloxacin should not be used in patients with a history of myasthenia gravis due to the risk of exacerbating muscle weakness.

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