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Drug Information

What is Gentamicin used for?

Gentamicin injection is used for the treatment of severe bacterial infections caused due toP. aeruginosa, Proteusspecies,E.Coli, Klebsiella-Enterobacter-Serratiaspecies,Citrobacterspecies andStaphylococcusspecies.

Gentamicin eye drops/ointment is used for the treatment of bacterial infections of eyes or eyelids. Gentamicin ear drops is used for the treatment of ear infections such as otitis media or otitis externa.

Gentamicin may also be prescribed for other conditions as determined by the doctor.

How does Gentamicin work?

Gentamicin is a broad-spectrum aminoglycoside antibiotic. It is effective against both the gram-positive and gram-negative bacteria. It acts by inhibiting the synthesis of essential proteins for the bacterial growth.

How to use Gentamicin?

The dosage and the drug form depend on the age, weight and medical condition of an individual. Use Gentamicin as prescribed by your doctor.

Gentamicin medicine is available in the form of eye drops, ear drops, cream, and injection. Read the instructions and the directions to use on the leaflet provided along with the medicine.

If you miss a dose of Gentamicin, please use it immediately once you remember. However, if it is almost time for your next dose, then skip the missed dose and continue with your regular dosing schedule. Do not use a double dose to make up for the missed dose.

What are the drugs that interact with Gentamicin?

Drugs that interact with Gentamicin eye/ear drops include the following:

  • Amphotericin B
  • Ciclosporin
  • Cisplatin
  • Colistin
  • Polymixin
  • Tacrolimus
  • Teicoplanin

This is not a comprehensive list of drug interactions. Consult your doctor to know more about other possible drug interactions.

What are the side effects of Gentamicin?

The following are the most common side effects of Gentamicin eye drops:

  • Redness of eye
  • Headache
  • Blurred vision
  • Burning or stinging sensation in the eye

The following are the most common side effects of Gentamicin ear drops:

  • Hearing loss
  • Tinnitus

This is not a complete list of side effects and others may occur. Please consult your doctor to know more about other possible side effects.

What special precautions Gentamicin?

  • Avoid using the medicine if you are allergic to Gentamicin or similar drugs.
  • Do not stop using the medication abruptly unless instructed by the doctor. Suddenly discontinuing the medication may cause the illness to return.
  • Do not exceed the dose more than what is prescribed.
  • Do not use the medicine if its colour changes, turns cloudy, or if it contains particulate matter.
  • Avoid Gentamicin during pregnancy or breastfeeding because the safe use of the drug is not yet established.

What should you tell your doctor before using  Gentamicin?

  • Tell your doctor if you have any history of eye/ear disorder or eye/ear surgery.
  • Inform the doctor if you are taking any other drugs, OTC medications, herbal products or nutritional supplements.

Frequently Asked Questions about Gentamicin

  1. Can I stop taking Gentamicin if the symptoms subside?
  2. No. It is important to complete the prescribed dose of Gentamicin medicine unless instructed by your doctor. Discontinuing the drug suddenly may cause the infection to reoccur.

  3. How long can I take Gentamicin?
  4. Use Gentamicin as advised by the doctor. It is prescribed for not more than 7 to 10 days.

  5. What are the other formulations of Gentamicin available?
  6. Apart from Gentamicin eye drops, cream, ear drops or injection, it is also available in the tablet dosage form.

  7. How should Gentamicin be stored?
  8. Store the drug at room temperature and do not freeze. Keep it away from direct sunlight.

  9. I am on Gentamicin for conjunctivitis. Can I stop the drug if I feel better?
  10. No. Use Gentamicin medicine for the full course of treatment. Do not discontinue the drug without doctor’s advice as it may cause a secondary infection.


The contents of this website are for informational purposes only and not intended to be a substitute for professional medical advice, diagnosis, or treatment.  Please seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Do not disregard professional medical advice or delay in seeking it because of something you have read on this website.

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