POM-V Prescription Required

Neoiven 500 000 IU/g Powder for Use in Drinking Water/Milk Replacer

Active ingredient: Neomycin

Form

Powder

Species

Cattle Chickens Duck Goose Partridge Pigs Quail Turkeys

Manufacturer

Laboratorios e Industrias IVEN S.A.

VMD MA No.

48749/4000

What it's used for

For treatment of gastrointestinal infections caused by

Full indications, dosage and side effects ↓

View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Neomycin

1

Ask your vet for a written prescription

They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
2

Fill it at a registered online retailer

The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Your prescription rights → VMD register of retailers →

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Neoiven 500 000 IU/g Powder for Use in Drinking Water/Milk Replacer — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

For treatment of gastrointestinal infections caused by

In drinking water/milk replacer use.
25 000 IU of neomycin per kg bodyweight per day for 3 to 4 consecutive days,
corresponding to 5 g of veterinary medicinal product per 100 kg bodyweight per day
for 3 to 4 days.
The following formula may be used to calculate the required amount of veterinary
medicinal product in g per litre drinking water/milk replacer:
g of product/kg b.w. /day x mean body weight (kg)

Unlimited renewal: May 2023
AN: 00156/2023
g of product per = of animals to be treated
l drinking water/milk replacer Mean daily water/milk replacer consumption (l)
per animal
To ensure a correct dosage body weight should be determined as accurately as
possible to avoid underdosing.
The intake of medicated water depends on the clinical condition of the animals. In
order to obtain the correct dosage the concentration of neomycin has to be adjusted
accordingly.
The maximum solubility of the powder is 255 000 IU of neomycin/ml (510 g of
product/L) of water.
For the administration of the product commercially available dosing pumps can be
used.

Do not use in case of hypersensitivity to the active substance, to aminoglycosides or
to the excipients or in the presence of intestinal obstruction.

None known.

Medicated drinking water intake can be affected by the severity of the disease. In
case of insufficient intake of water, animals should be treated parenterally.

Special precautions for use in animals
Powder for oral solution that is to be dissolved in water and cannot be used as it is.
Special care should be taken when considering to administer the product to the
newborn calf due to the known higher gastrointestinal absorption of neomycin in
neonates. This higher absorption could lead to an increased risk of oto- and
nephrotoxicity. The use of the product in neonates should be based on the
benefit/risk determination from the attending veterinarian.

Unlimited renewal: May 2023
AN: 00156/2023
Use of the product should be based on susceptibility testing of the bacteria isolated
from the animal. If this is not possible, therapy should be based on local (regional,
farm level) epidemiological information about susceptibility of the target bacteria.
Official, national and regional antimicrobial policies should be taken into account when
the product is used.
Use of the product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to neomycin and may decrease the effectiveness of
treatment with aminoglycosides due to the potential for cross resistance.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Wash hands after use.
People with known hypersensitivity to aminoglycosides should avoid contact with the
veterinary medicinal product.
If you develop symptoms following exposure such as a skin rash, you should seek
medical advice and show the doctor this warning. Swelling of the face, lips or eyes or
difficulty with breathing are more serious symptoms and require urgent medical
attention.

General anaesthetics and muscle relaxing products increase the neuro-blocking effect
of aminoglycosides. This may cause paralysis and apnoea.
Special care should be taken when using concurrently with strong diuretics and
potentially oto- or nephrotoxic substances.

This veterinary medicinal product does not require any special storage conditions.

Cattle:
Meat and offal: 14 days.
Pigs.
Weaned and fattening pigs: 3 days.
Chickens, layer hen, ducks, turkeys, turkey hen, goose, quail and partridge:
Meat and offal: 14 days.
Eggs: zero days.
5.

This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.