Levofloxacin Noridem (Levofloxacin Hemihydrate)

Levofloxacin is a fluoroquinolone antibiotic used to treat bacterial infections in various organ systems.

• Community‑acquired pneumonia: eradicates the causative bacteria, improving respiratory function.
• Hospital‑acquired pneumonia: provides broad‑spectrum coverage against resistant pathogens.
• Acute bacterial sinusitis: reduces sinus inflammation by eliminating the infecting organisms.
• Acute bacterial exacerbation of chronic bronchitis: shortens symptom duration and prevents complications.
• Uncomplicated urinary tract infections: clears the infection and relieves urinary symptoms.
• Skin and soft‑tissue infections: eliminates skin pathogens and promotes healing.

• Levofloxacin inhibits bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, enzymes essential for DNA replication, transcription, and repair. By binding to these enzymes, it prevents the supercoiling and separation of DNA strands, leading to bacterial cell death and a bactericidal effect against susceptible Gram‑negative and Gram‑positive organisms.

Levofloxacin may cause a range of adverse reactions.

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Diarrhea: loose stools, sometimes watery.
• Headache: transient cranial discomfort.
• Dizziness: sensation of light‑headedness.
• Insomnia: difficulty falling or staying asleep.
• Rash: mild skin erythema or itching.

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 after intestinal flora disruption.
• Severe allergic reactions: anaphylaxis, angioedema, or Stevens‑Johnson syndrome.
• Peripheral neuropathy: numbness or tingling in extremities.
• Photosensitivity: increased skin reaction to sunlight.

When using Levofloxacin, consider the following precautions.

• Renal function: adjust dosing in patients with severe impairment.
• History of tendon disorders: avoid use or monitor closely for tendon pain.
• Cardiac risk: avoid in patients with known QT prolongation or arrhythmias.
• Pregnancy and lactation: prescribe only if benefits outweigh potential risks.
• Concurrent antacids or supplements: separate administration by at least 2 hours to prevent reduced absorption.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Levofloxacin can interact with several medicines.

Major Interactions (Avoid)

• NSAIDs: increased risk of central nervous system stimulation.
• Warfarin: enhanced anticoagulant effect, may raise INR.
• Theophylline: elevated serum theophylline concentrations.
• Cyclosporine: increased cyclosporine levels, risk of nephrotoxicity.

Moderate Interactions (Monitor Closely)

• Antacids containing magnesium or aluminum, sucralfate: reduce levofloxacin absorption.
• Iron or zinc supplements: diminish oral bioavailability.
• Corticosteroids: heightened risk of tendon rupture.