Levofloxacina Bioindustria L.I.M. (Levofloxacin)

Levofloxacin is indicated for several serious bacterial infections that often require intravenous therapy.

• Community‑Acquired Bacterial Pneumonia: achieves clinical cure and bacterial eradication.
• Complicated Urinary Tract Infection: resolves infection and prevents recurrence.
• Intra‑Abdominal Infections: provides effective coverage against mixed aerobic and anaerobic pathogens.
• Skin and Soft‑Tissue Infections: treats moderate to severe infections caused by susceptible organisms.
• Acute Bacterial Sinusitis: reduces symptoms and eliminates causative bacteria.

• Levofloxacin inhibits bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, enzymes essential for DNA replication, transcription, and repair. By stabilizing the enzyme‑DNA complex, it prevents the resealing of DNA strands, leading to bacterial cell death. This bactericidal action is broad‑spectrum, affecting both Gram‑positive and Gram‑negative organisms.

Levofloxacin may cause a range of adverse reactions, from mild to severe.

Common Side Effects

• Nausea: mild to moderate gastrointestinal upset.
• Diarrhea: may be watery or loose.
• Headache: transient and often resolves without treatment.
• Dizziness: occasional light‑headed sensation.
• Rash: mild skin erythema or pruritus.
• Elevated liver enzymes: transient increase in hepatic transaminases.

Serious or Rare Side Effects

• Tendon rupture: especially Achilles tendon, may occur without warning.
• QT interval prolongation: can precipitate cardiac arrhythmias.
• Clostridioides difficile infection: severe colitis requiring medical attention.
• Severe allergic reactions: anaphylaxis, angioedema, or Stevens‑Johnson syndrome.
• Peripheral neuropathy: persistent numbness or tingling.
• Hepatotoxicity: rare cases of liver injury.

Levofloxacin requires careful consideration of patient‑specific factors before use.

• Renal impairment: dose adjustment may be needed based on creatinine clearance.
• History of tendon disorders: avoid use in patients with prior tendon injury.
• Cardiac risk: monitor QT interval in patients with known prolongation or electrolyte disturbances.
• Hypersensitivity: discontinue if allergic reaction occurs.
• Pregnancy and lactation: safety not established; use only if benefits outweigh risks.
• Pediatric use: contraindicated in children due to risk of musculoskeletal toxicity.
• Store at ambient temperature: keep in original container, protect from moisture and light.

Levofloxacin can interact with several medicines, altering efficacy or safety.

Major Interactions (Avoid)

• Antacids or supplements containing magnesium/aluminum: reduce levofloxacin absorption.
• Warfarin: may increase INR and bleeding risk.
• Cyclosporine: can raise cyclosporine plasma levels.
• Theophylline: may increase theophylline toxicity.
• Quinidine: heightened risk of cardiac arrhythmias.

Moderate Interactions (Monitor Closely)

• NSAIDs: combined use may lower seizure threshold.
• Corticosteroids: increased risk of tendon rupture.
• Diabetic agents: potential for hypoglycemia.
• SSRIs or other QT‑prolonging drugs: monitor cardiac rhythm.
• Rifampin: may reduce levofloxacin concentrations.