Nettacin (Netilmicin)

• Netilmicin is used to treat bacterial infections of the eye by targeting susceptible ocular pathogens.
• Bacterial conjunctivitis: Reduces bacterial load and accelerates resolution of infection.
• Keratitis: Controls bacterial proliferation and promotes corneal healing.
• Other ocular infections caused by susceptible bacteria: Provides broad‑spectrum antibacterial coverage for various eye infections.

• Netilmicin binds to the bacterial 30S ribosomal subunit, interfering with the initiation complex of protein synthesis. This binding causes misreading of mRNA and blocks the addition of amino acids, leading to defective proteins and ultimately bactericidal activity against susceptible Gram‑negative and some Gram‑positive ocular pathogens.

Netilmicin may cause local ocular reactions and, rarely, systemic effects.

Common Side Effects

• Stinging or burning sensation upon instillation.
• Transient eye redness.
• Mild itching or irritation.
• Temporary blurred vision.
• Increased tearing.
• Mild conjunctival hyperemia.

Serious or Rare Side Effects

• Allergic reactions such as eyelid swelling or rash.
• Corneal ulceration or epithelial defect.
• Severe eye pain or vision loss.
• Systemic ototoxicity or nephrotoxicity (rare with topical use).
• Anaphylaxis (extremely rare).

• Before using Nettacin, consider the following precautions.
• Assess bacterial susceptibility: Verify that the causative organism is susceptible to netilmicin.
• Avoid in patients with known hypersensitivity: Do not use if the patient has a documented allergy to aminoglycosides.
• Monitor renal function: Prolonged or extensive ocular absorption may affect renal function in vulnerable patients.
• Use with caution in pre‑existing corneal disease: Patients with corneal ulcers or severe dry eye may experience delayed healing.
• Do not combine with other ophthalmic antibiotics unless directed by a clinician.
• Store at room temperature: Keep in the original container, protect from light and moisture.

Netilmicin may interact with other agents when used concurrently.

Major Interactions (Avoid)

• Systemic aminoglycosides: Concurrent systemic use can increase risk of nephrotoxicity and ototoxicity.
• Ophthalmic agents containing preservatives that may irritate the ocular surface.

Moderate Interactions (Monitor Closely)

• Topical corticosteroids: May mask signs of infection, requiring close monitoring.
• Other topical antibiotics: Potential for antagonistic effects; assess necessity.
• Anticholinergic eye drops: May reduce tear production, affecting drug distribution.