Oftaquix (Levofloxacin Hemihydrate)

Levofloxacin is a broad‑spectrum fluoroquinolone used to treat infections caused by susceptible bacteria.

• Community‑Acquired Pneumonia: eradicates the typical bacterial pathogens and improves respiratory function.
• Acute Bacterial Sinusitis: reduces sinus inflammation and clears the infection.
• Acute Exacerbation of Chronic Bronchitis: shortens symptom duration and prevents complications.
• Uncomplicated Urinary Tract Infection: eliminates uropathogens and resolves urinary symptoms.
• Skin and Soft‑Tissue Infections: controls bacterial spread and promotes wound healing.
• Acute Bacterial Prostatitis: penetrates prostatic tissue to eradicate infection.

• 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 strand re‑ligation, leading to lethal double‑strand breaks and 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: occasional light‑headedness.
• Insomnia: difficulty falling or staying asleep.
• Rash: mild skin erythema.

Serious or Rare Side Effects

• Tendon rupture: especially Achilles, often linked to sudden activity.
• QT interval prolongation: may precipitate cardiac arrhythmias.
• Severe hypersensitivity: including Stevens‑Johnson syndrome.
• Peripheral neuropathy: persistent numbness or tingling.
• Hepatotoxicity: elevated liver enzymes or jaundice.
• Central nervous system effects: seizures or psychosis.

Levofloxacin should be used with caution in specific clinical situations.

• Hypersensitivity: avoid in patients with known fluoroquinolone allergy.
• Tendon disorders: discontinue if tendon pain or swelling occurs.
• Cardiac risk: monitor QT interval in patients with arrhythmia history.
• Central nervous system: use carefully in patients with seizures or psychiatric disorders.
• Pregnancy and lactation: avoid unless benefits outweigh potential risks.
• Renal impairment: adjust dose based on renal function.
• Store at room 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/iron: reduce levofloxacin absorption.
• Warfarin: may increase INR and bleeding risk.
• Theophylline: heightened risk of seizures and cardiac toxicity.
• Cyclosporine: increased serum levels of both drugs.
• NSAIDs (e.g., ibuprofen): heightened risk of CNS stimulation and seizures.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: reduced contraceptive effectiveness.
• Diabetic agents: potential for altered blood glucose control.
• Corticosteroids: increased risk of tendon rupture.
• Diuretics: possible electrolyte disturbances.
• Antidepressants (SSRIs): monitor for QT prolongation.