Netilmicin Eye Drops: Uses, Brands & Dosage

Netilmicin is an antibiotic eye medicine used to treat various bacterial eye infections like conjunctivitis, keratitis, and blepharitis.

Drug class	Antibiotic (Aminoglycoside)
Type	Single
Forms	Eye Drop / Ointment
Common strength	0.3%
Common Indian brands	Nettacin, Netromax (eye)
Prescription status	Prescription

What Netilmicin is used for

Netilmicin is an antibiotic eye medicine prescribed to treat bacterial infections of the eye. It is effective against a range of bacteria that can cause eye problems.

Bacterial Conjunctivitis: This is an infection of the conjunctiva, the clear membrane that covers the white part of your eye and the inside of your eyelids. It often causes redness, itching, a gritty feeling, and discharge from the eye.
Keratitis: This refers to inflammation of the cornea, the clear, dome-shaped front surface of your eye. Bacterial keratitis can be serious and may affect your vision if not treated promptly.
Blepharitis: This is an inflammation of the eyelids, usually affecting the part where the eyelashes grow. It can cause red, itchy, swollen eyelids and crusty eyelashes.

Your ophthalmologist will determine if Netilmicin is the right treatment for your specific eye infection.

How it works

Netilmicin belongs to a class of medicines called aminoglycoside antibiotics. It works by stopping the growth of bacteria that cause eye infections. Specifically, it interferes with the bacteria’s ability to produce essential proteins, which are vital for their survival and multiplication. By blocking this protein synthesis, Netilmicin effectively kills the bacteria or prevents them from spreading, allowing your body to heal the infection.

It is often considered a useful alternative to other antibiotics like gentamicin, as it may be better tolerated by the eye’s surface.

How it’s used

Netilmicin is available as an eye drop or an eye ointment. Your ophthalmologist will advise you on the correct form and how to use it.

Typical Dosing: For eye drops, the usual recommendation is to instil 1 drop into the affected eye 3-4 times a day, or as directed by your doctor. For eye ointment, your doctor will provide specific instructions.

It is crucial to follow your doctor’s instructions precisely regarding the dose, frequency, and duration of treatment. Do not stop using the medicine even if your symptoms improve, unless advised by your ophthalmologist, as stopping early can lead to the infection returning.

Always follow your ophthalmologist’s exact instructions.

Brands available in India

Nettacin
Netromax (eye)

Brand availability and pricing vary; confirm with your pharmacist.

Good to know

Prescription eye medicine — use only as directed by a qualified ophthalmologist. This page is for general education and is not a substitute for professional medical advice, diagnosis or a prescription. Do not self-medicate or reuse an old prescription.

Precautions & side effects

As with any prescription medicine, it’s important to be aware of certain precautions when using Netilmicin:

Prescription Only: Netilmicin is a prescription eye medicine. It should only be used as directed by a qualified ophthalmologist. Do not self-medicate or use an old prescription without consulting your doctor.
Gentamicin Alternative: Netilmicin is often chosen as an alternative to gentamicin, another antibiotic, because it may cause less surface toxicity to the eye. This means it might be better tolerated by some patients.
Allergies: Inform your doctor if you have ever had an allergic reaction to Netilmicin or any other antibiotic, especially aminoglycosides.
Contact Lenses: Generally, it is advisable to avoid wearing contact lenses while you have an eye infection and during treatment with eye drops or ointments. Your doctor will provide specific guidance on this.
Driving and Vision: Eye drops or ointments can sometimes cause temporary blurred vision immediately after application. If this occurs, avoid driving or operating machinery until your vision clears.
Complete the Course: Always complete the full course of treatment as prescribed by your doctor, even if your symptoms improve. Stopping early can lead to the infection recurring or becoming more difficult to treat.
Storage: Store the medicine as instructed by your pharmacist or doctor, typically in a cool, dry place, away from direct sunlight and out of reach of children.

If you experience any unusual or severe side effects, or if your condition worsens, contact your ophthalmologist immediately.

Understanding Eye Infections and Their Treatment

Our eyes are delicate organs, and sometimes they can become infected by bacteria. These infections can range from common conditions like conjunctivitis (often called ‘pink eye’) to more serious ones like keratitis, which affects the clear front part of your eye. Symptoms of eye infections often include redness, irritation, itching, discharge, a gritty feeling, or blurred vision. It’s crucial to seek prompt medical attention from an ophthalmologist if you suspect an eye infection. They can accurately diagnose the problem and prescribe the appropriate treatment, such as antibiotic eye drops or ointments like Netilmicin, to help clear the infection and prevent complications.

Bacterial eye infections, if left untreated, can sometimes lead to more severe problems, including damage to your vision. Antibiotics work by targeting and eliminating the bacteria responsible for the infection, allowing your eye to heal. Always remember that self-medication is risky, as different types of infections require different treatments, and using the wrong medicine can delay recovery or even worsen the condition.

Correct Application of Eye Drops and Ointments

Using eye drops or ointments correctly is vital for the medicine to be effective. Here’s a general guide:

Wash Your Hands: Always wash your hands thoroughly with soap and water before touching your eyes or the medicine bottle/tube.
Prepare: If using eye drops, shake the bottle gently. If using ointment, ensure the tube is at room temperature so the ointment flows easily.
Position: Tilt your head back or lie down. Gently pull your lower eyelid down with one finger to create a small pocket.
Apply Drops: Hold the dropper tip directly over your eye, without touching your eye or eyelashes. Squeeze one drop into the pocket you created. Close your eye gently for a minute or two, without blinking excessively, to allow the medicine to spread.
Apply Ointment: Hold the ointment tube above your eye, again without touching your eye or eyelashes. Squeeze a small ribbon of ointment (about 1 cm) into the pocket of your lower eyelid. Close your eye gently for a few minutes to allow the ointment to melt and spread. You may experience temporary blurred vision with ointment.
Clean Up: Blot any excess liquid or ointment from your eyelid with a clean tissue. Do not wipe the tip of the dropper or tube with your fingers.
Wash Hands Again: Wash your hands again after application.

If you need to use more than one type of eye drop, wait at least 5-10 minutes between different medications to ensure each drop is absorbed properly. If you are using both drops and ointment, apply the drops first, wait 5-10 minutes, and then apply the ointment.

General Hygiene, Storage, and When to Seek Help

Maintaining good hygiene is essential when dealing with eye infections. Avoid touching your eyes unnecessarily, and if you must, ensure your hands are clean. Do not share eye drops, ointments, towels, or pillowcases with others, as this can spread the infection. Replace your eye makeup, if applicable, after the infection has cleared to prevent re-infection.

Store your Netilmicin eye drops or ointment according to the instructions on the packaging or from your pharmacist, usually in a cool, dry place, away from direct sunlight and moisture. Keep it out of reach of children. Always check the expiry date and discard the medicine after the recommended period (usually 28 days after opening for eye drops, even if some medicine remains) to prevent contamination and ensure effectiveness.

It’s important to monitor your symptoms while using Netilmicin. If your symptoms do not improve within a few days, or if they worsen, if you experience new or severe pain, significant vision changes, or any signs of an allergic reaction (like severe itching, swelling, or rash), contact your ophthalmologist immediately. They will assess your condition and adjust your treatment if necessary. Remember, this page provides general information and is not a substitute for professional medical advice, diagnosis, or a prescription from a qualified ophthalmologist.

Frequently asked questions

What is Netilmicin used for?

Netilmicin is an antibiotic eye medicine used to treat bacterial eye infections such as bacterial conjunctivitis (pink eye), keratitis (inflammation of the cornea), and blepharitis (inflammation of the eyelids).

How does Netilmicin work?

Netilmicin works by blocking the production of essential proteins within bacteria, which are necessary for their growth and survival. By doing so, it stops the bacteria from multiplying and helps to clear the eye infection.

What are the common brands of Netilmicin available in India?

In India, Netilmicin eye medicine is commonly available under brand names such as Nettacin and Netromax (eye).

How should I use Netilmicin eye drops or ointment?

Typically, for eye drops, you should instil 1 drop into the affected eye 3-4 times a day, or as directed by your ophthalmologist. For eye ointment, your doctor will give you specific instructions. Always wash your hands before and after application, and avoid touching the tip of the dropper or tube to your eye or any other surface. Complete the full course of treatment as prescribed, even if your symptoms improve.

Do I need a prescription to buy Netilmicin?

Yes, Netilmicin is a prescription eye medicine. You will need a valid prescription from a qualified ophthalmologist to purchase it.

What precautions should I take while using Netilmicin?

Only use Netilmicin as directed by your ophthalmologist. Inform your doctor about any allergies you may have. Avoid wearing contact lenses during treatment unless advised otherwise by your doctor. Be aware that it may cause temporary blurred vision after application. Always complete the full course of treatment, and contact your doctor if your symptoms do not improve or worsen, or if you experience any unusual side effects.

References

Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.

This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.