Oftalmolosa Cusí Eritromicina (Erythromycin)

Oftalmolosa Cusí Eritromicina is a macrolide antibiotic used in ocular infections affecting the conjunctiva, cornea and surrounding tissues.

• Bacterial conjunctivitis: Reduces bacterial load and accelerates healing of the conjunctiva.
• Bacterial keratitis: Controls infection and supports corneal epithelial recovery.
• Post‑surgical ocular prophylaxis: Prevents bacterial contamination after eye surgery.

• Erythromycin inhibits bacterial protein synthesis by binding to the 50S ribosomal subunit, blocking translocation of the peptide chain. This action prevents bacterial growth and promotes clearance of susceptible ocular pathogens, providing a bacteriostatic effect in the eye.

Adverse reactions to erythromycin ophthalmic preparations are generally mild and localized.

Common Side Effects

• Burning sensation: Temporary discomfort upon instillation.
• Stinging or itching: Mild irritation that resolves quickly.
• Redness of the conjunctiva: Transient hyperemia.
• Tearing: Increased lacrimation after dosing.
• Blurred vision: Short‑term visual disturbance.
• Foreign‑body sensation: Feeling of grit in the eye.

Serious or Rare Side Effects

• Severe allergic reaction: Swelling, rash, or difficulty breathing.
• Corneal ulceration: Persistent epithelial defect or ulcer.
• Vision loss: Sudden decrease in visual acuity.
• Persistent pain: Ongoing ocular discomfort beyond initial irritation.

When using erythromycin eye drops, consider the following precautions to ensure safe and effective therapy.

• Allergy assessment: Verify no known hypersensitivity to macrolides or formulation excipients.
• Contact lens wearers: Remove lenses before instillation and wait before reinserting.
• Concomitant ocular meds: Separate administration times to avoid dilution.
• Pediatric use: Adjust dosing frequency as directed by a clinician.
• Pregnancy and lactation: Use only if clearly needed and prescribed.
• Store at below 25°C: Keep in the original container, protect from moisture and direct sunlight.

Erythromycin ophthalmic solution may interact with other ocular medications and systemic drugs that affect the eye.

Major Interactions (Avoid)

• Anticholinergic eye drops: May reduce drug absorption.
• Topical corticosteroids: Increased risk of secondary infection.

Moderate Interactions (Monitor Closely)

• Systemic macrolides: Potential additive systemic exposure.
• Antihistamine eye drops: May exacerbate dryness.
• Non‑steroidal anti‑inflammatory eye drops: Possible irritation increase.