Levofloxacina (Levofloxacin Hemihydrate)

Levofloxacina is indicated for bacterial infections of the eye, targeting common ocular pathogens.

• Bacterial conjunctivitis: reduces bacterial load and accelerates resolution of redness, discharge, and irritation.
• Bacterial keratitis: eradicates causative organisms, promoting corneal healing and preventing scarring.
• Post‑operative ocular prophylaxis: prevents postoperative bacterial infection after cataract or refractive surgery.
• Corneal ulcer: facilitates microbial clearance and supports epithelial regeneration.

• Levofloxacin inhibits bacterial DNA gyrase and topoisomerase IV, enzymes essential for DNA replication and transcription. By binding to these enzymes, the drug prevents the supercoiling and separation of DNA strands, leading to bacterial cell death. This mechanism provides broad‑spectrum activity against Gram‑positive and Gram‑negative ocular pathogens, making it effective for topical treatment of bacterial eye infections.

Levofloxacina may cause ocular and systemic adverse reactions; they are categorized by frequency and severity.

Common Side Effects

• Eye irritation: mild burning or stinging upon instillation.
• Redness: transient conjunctival hyperemia.
• Tearing: increased lacrimation.
• Blurred vision: temporary visual disturbance.
• Foreign body sensation: feeling of grit in the eye.
• Photophobia: sensitivity to light.

Serious or Rare Side Effects

• Allergic reaction: swelling, rash, or anaphylaxis.
• Tendon rupture: rare systemic effect, especially in patients with risk factors.
• Stevens‑Johnson syndrome: severe skin and mucous membrane disorder.
• Severe ocular inflammation: worsening keratitis or uveitis.
• Corneal perforation: rare but vision‑threatening complication.

Before prescribing Levofloxacina, clinicians should consider several precautionary measures to ensure safe use.

• Allergy assessment: verify no known hypersensitivity to fluoroquinolones.
• Indication confirmation: use only for confirmed bacterial eye infections.
• Systemic exposure caution: avoid in patients with a history of tendon disorders.
• Pregnancy and lactation: safety category unknown; prescribe only if benefits outweigh potential risks.
• Drug interactions: review concomitant systemic fluoroquinolones or anticoagulants.
• Store at room temperature: keep below 25 °C in the original container, protected from moisture and light.

Levofloxacina can interact with other medicines; awareness of major and moderate interactions helps prevent adverse outcomes.

Major Interactions (Avoid)

• Systemic fluoroquinolones: concurrent use may increase systemic toxicity.
• Antacids or supplements containing magnesium, aluminum, calcium, or iron: reduce ocular absorption.
• Warfarin: may enhance anticoagulant effect and increase bleeding risk.

Moderate Interactions (Monitor Closely)

• Corticosteroid eye drops: combined use raises risk of tendon injury and delayed wound healing.
• NSAID eye preparations: may potentiate central nervous system side effects.