Levofloxacina Galenica Senese (Levofloxacin Hemihydrate)

Levofloxacin is a broad‑spectrum antibacterial used to treat infections caused by susceptible Gram‑negative and Gram‑positive bacteria.

• Community‑acquired pneumonia: effective therapy for adult patients with moderate to severe disease, reducing bacterial load and improving clinical outcomes.
• Complicated urinary tract infections: eradicates uropathogens, facilitating resolution of infection and prevention of recurrence.
• Skin and soft tissue infections: treats cellulitis, abscesses, and other bacterial skin conditions, promoting healing.
• Intra‑abdominal infections: targets mixed aerobic and anaerobic organisms in peritonitis and intra‑abdominal sepsis.
• Bacterial prostatitis: achieves high prostatic tissue concentrations to eliminate causative bacteria.

• Levofloxacin exerts its antibacterial activity by binding to bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, enzymes essential for DNA supercoiling and replication. Inhibition of these enzymes prevents DNA synthesis and transcription, leading to bacterial cell death. The drug displays concentration‑dependent killing and a post‑antibiotic effect against a wide range of Gram‑positive and Gram‑negative organisms.

Levofloxacin may cause a range of adverse reactions, varying in frequency and severity.

Common Side Effects

• Nausea: mild gastrointestinal upset.
• Diarrhea: loose stools.
• Headache: transient cranial discomfort.
• Rash: mild skin erythema or itching.

Serious or Rare Side Effects

• Tendon rupture: risk of Achilles or other tendons.
• QT prolongation: potential cardiac rhythm disturbance.
• Severe hypersensitivity: anaphylaxis or Stevens‑Johnson syndrome.

When prescribing levofloxacin, clinicians should consider several precautionary measures to minimize risks.

• Renal impairment: adjust dose or monitor renal function.
• History of tendon disorders: avoid use in patients with prior tendon injury.
• Cardiac arrhythmias: caution in those with prolonged QT interval.
• Concomitant CNS active drugs: monitor for seizures or neurotoxicity.
• Pregnancy: category C, use only if benefits outweigh risks.
• Store at ambient temperature: keep below 25 °C, protect from moisture and light in original packaging.

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

Major Interactions (Avoid)

• Antacids containing aluminum or magnesium: reduce absorption; separate dosing by at least 2 hours.
• Warfarin: may increase INR; monitor coagulation parameters closely.
• NSAIDs (e.g., ibuprofen): heightened risk of CNS stimulation and seizures.

Moderate Interactions (Monitor Closely)

• Theophylline: increased plasma levels; monitor for toxicity.
• Cyclosporine: elevated concentrations; adjust dose as needed.
• Diabetic agents (e.g., insulin, sulfonylureas): may cause hypoglycemia; monitor blood glucose.