Levofloxacin Sandoz (Levofloxacin)

Levofloxacin is a broad‑spectrum fluoroquinolone used to treat severe bacterial infections across several organ systems.

• Community‑acquired bacterial pneumonia: rapid bacterial eradication to improve respiratory function.
• Hospital‑acquired bacterial pneumonia: effective against resistant pathogens in critical care settings.
• Complicated urinary tract infections: clears infection in upper urinary tract and kidneys.
• Complicated intra‑abdominal infections: targets mixed aerobic and anaerobic organisms.
• Skin and skin‑structure infections: resolves cellulitis, abscesses, and wound infections.
• Septicemia: systemic bacterial clearance in bloodstream infections.

• 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 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 gastrointestinal upset.
• Diarrhea: loose stools, sometimes watery.
• Headache: transient cranial discomfort.
• Dizziness: sensation of light‑headedness.
• Injection site reactions: redness or pain at the IV site.
• Rash: mild skin erythema.

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 after disruption of gut flora.
• Severe allergic reactions: anaphylaxis, angioedema, or Stevens‑Johnson syndrome.
• Hepatic dysfunction: elevated liver enzymes or hepatitis.
• Seizures: particularly in patients with CNS disorders or on interacting drugs.

Levofloxacin requires careful assessment before use to minimise risks.

• Renal function assessment: dose adjustment may be needed in impaired kidneys.
• Tendon monitoring: advise patients to report tendon pain or swelling.
• Hypersensitivity check: avoid in individuals with known fluoroquinolone allergy.
• QT prolongation caution: use cautiously with other QT‑prolonging agents.
• Concomitant drug review: evaluate for interactions with NSAIDs, anticoagulants, and antacids.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Levofloxacin can interact with several medication classes, affecting safety or efficacy.

Major Interactions (Avoid)

• Other fluoroquinolones: additive toxicity risk.
• QT‑prolonging drugs (e.g., macrolides, antiarrhythmics): increased arrhythmia potential.
• Non‑steroidal anti‑inflammatory drugs (NSAIDs): heightened CNS adverse effects.
• Antacids containing aluminum or magnesium: reduced levofloxacin absorption.
• Warfarin: may enhance anticoagulant effect and INR.

Moderate Interactions (Monitor Closely)

• Corticosteroids: elevated risk of tendon rupture.
• Cyclosporine: potential for increased nephrotoxicity.
• Diabetic agents: possible alteration of glucose control.
• Theophylline: may raise serum theophylline levels.
• Oral contraceptives: reduced hormonal efficacy, consider backup contraception.