Levofloxacin Fresenius Kabi (Levofloxacin Hemihydrate)

• Levofloxacin is a broad‑spectrum fluoroquinolone used for bacterial infections affecting the respiratory, urinary, skin and systemic systems.
• Community‑acquired pneumonia: achieves bacterial eradication and clinical cure in adult patients.
• Hospital‑acquired pneumonia: provides effective coverage against common nosocomial pathogens.
• Complicated urinary tract infections: clears infection and resolves symptoms.
• Skin and soft‑tissue infections: reduces bacterial load and promotes healing.
• Septicemia: contributes to rapid bacterial clearance and improves survival outcomes.

• Levofloxacin inhibits bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, enzymes essential for DNA replication, transcription, and repair. By stabilizing the DNA‑enzyme 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 gastrointestinal upset.
• Diarrhea: loose stools, sometimes watery.
• Headache: transient cranial discomfort.
• Dizziness: occasional vertiginous 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: risk of ventricular arrhythmias.
• Clostridioides difficile infection: severe colitis following dysbiosis.
• Severe allergic reactions: anaphylaxis, Stevens‑Johnson syndrome.
• Seizures: particularly in patients with CNS disorders.
• Hepatic failure: rare but potentially life‑threatening liver injury.

• Levofloxacin should be used with caution in specific clinical situations.
• Renal function: adjust dosing in patients with impaired renal clearance.
• CNS effects: monitor for seizures, especially in patients with a history of epilepsy.
• Tendon health: avoid in individuals with prior tendon disorders or those on corticosteroids.
• QT interval: use cautiously in patients with known cardiac arrhythmias or electrolyte abnormalities.
• Pregnancy and lactation: risk unknown; prescribe only when benefits outweigh potential risks.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

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

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: reduce levofloxacin absorption.
• Warfarin: may increase INR and bleeding risk.
• Cyclosporine: elevated cyclosporine concentrations.
• Theophylline: increased theophylline toxicity.
• NSAIDs: heightened risk of CNS stimulation and seizures.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: reduced hormonal efficacy, consider backup method.
• Diabetic agents: potential for enhanced hypoglycaemia.
• Corticosteroids: additive risk of tendon rupture.
• Diuretics: possible electrolyte disturbances.
• Rifampin: decreased levofloxacin plasma levels, may reduce effectiveness.