Antibiotic (Aminoglycoside)
Last reviewed June 2026
Who is this for?
Neomycin sulfate is an antibiotic that works by killing harmful bacteria in your gut. It belongs to a group of antibiotics called aminoglycosides and is mainly used to fight infections in the intestines because it is not well absorbed into the bloodstream when taken by mouth.
Binds irreversibly to the bacterial 30S ribosomal subunit, inhibiting protein synthesis and causing bacterial cell death. Acts as a bactericidal agent effective against aerobic gram-negative and gram-positive organisms in the gastrointestinal tract.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
For adults, the usual dose is 500 mg (1 tablet of Fest Neomycin 500) taken every 6 to 8 hours. Your doctor will tell you the exact dose depending on your condition. You can take it with or without food. Always complete the full course your doctor prescribed, even if you feel better.
If you miss a dose, take it as soon as you remember. But if it is almost time for your next dose, skip the missed one and continue your normal schedule. Do not take a double dose to make up for the one you missed.
Important for antibiotics
Always complete the full course even if you feel better. Stopping early can cause the infection to return and become drug-resistant.
Always complete the full course of this antibiotic — stopping early can make bacteria stronger and harder to treat next time. Buy only from trusted pharmacies, not roadside sellers, to make sure you are getting genuine Fest Neomycin 500. Do not share this medication with others, even if they have similar symptoms.
Avoid using with other aminoglycoside antibiotics like gentamicin as it increases the risk of kidney and hearing damage. Be careful if you are taking furosemide (a water tablet) as it can also increase the chance of hearing problems. If you are on blood-thinning medicines like warfarin, neomycin may increase their effect — tell your doctor.
Check your specific combination
Is it safe to take Neomycin with your other drugs?
Neomycin is not considered safe during pregnancy or breastfeeding as it may harm the baby's hearing and kidneys — do not use unless your doctor specifically tells you to.
Store in a cool, dry place away from direct sunlight and heat — Nigerian weather can be very hot, so avoid leaving it in your car or near a window. Keep the container tightly closed to protect from humidity. Always keep out of reach of children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.