Le-Vof (Levofloxacin Hemihydrate)

Levofloxacin is a broad‑spectrum antibacterial indicated for several serious infections.

• Community‑acquired pneumonia: achieves clinical cure and microbiological eradication.
• Hospital‑acquired pneumonia: effective in treating resistant Gram‑negative pathogens.
• Complicated urinary tract infections: resolves infection and prevents recurrence.
• Complicated intra‑abdominal infections: provides rapid bacterial clearance.
• Skin and soft tissue infections: reduces lesion size and bacterial load.
• Acute bacterial sinusitis: improves symptoms and clears the causative organism.

• 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 halted bacterial cell division and eventual cell death. This bactericidal action is effective against a wide range of Gram‑positive and Gram‑negative organisms.

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

Common Side Effects

• Nausea: mild to moderate upset stomach.
• Diarrhea: loose stools, sometimes watery.
• Headache: transient cranial discomfort.
• Dizziness: sensation of light‑headedness or unsteadiness.
• Rash: erythematous skin eruptions.
• Elevated liver enzymes: transient increase in hepatic transaminases.

Serious or Rare Side Effects

• Tendon rupture: especially Achilles tendon, often linked to sudden activity.
• QT interval prolongation: may predispose to cardiac arrhythmias.
• Clostridioides difficile infection: severe colitis with watery diarrhea.
• Severe allergic reactions: anaphylaxis, angioedema, or Stevens‑Johnson syndrome.
• Seizures: particularly in patients with CNS disorders.
• Hepatic failure: rare but potentially life‑threatening liver injury.

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

• Renal impairment: dose adjustment may be necessary based on creatinine clearance.
• History of tendon disorders: avoid use in patients with recent tendon injury or surgery.
• QT prolongation risk: monitor ECG in patients with cardiac disease or electrolyte abnormalities.
• Pregnancy and lactation: prescribe only if potential benefits outweigh risks.
• Concomitant medications: review for interactions that may increase toxicity or reduce efficacy.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Levofloxacin can affect the pharmacokinetics or pharmacodynamics of several drugs.

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: markedly reduce levofloxacin absorption.
• Warfarin: may increase INR and bleeding risk.
• Cyclosporine: elevated serum levels can lead to nephrotoxicity.
• Theophylline: increased risk of seizures and cardiac arrhythmias.
• Other fluoroquinolones: additive toxicity, especially tendon and CNS effects.

Moderate Interactions (Monitor Closely)

• NSAIDs: heightened risk of CNS stimulation and seizures.
• Corticosteroids: increased chance of tendon rupture.
• Diabetic agents (e.g., insulin, sulfonylureas): potential for hypoglycemia.
• QT‑prolonging drugs (e.g., macrolides, antiarrhythmics): monitor cardiac rhythm.
• Oral contraceptives: possible reduction in contraceptive efficacy.