Skip to content
POM-VPS Prescription Required

Noromectin 18.7 mg/g Oral Paste for Horses

Active ingredient: Ivermectin

Form

Paste

Species

Horses

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/3001

What it's used for

Ivermectin is not effective against encysted larval stages of the small strongyles.

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 Ivermectin

  1. 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. 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.

Prescription required

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

Clinical information

Noromectin 18.7 mg/g Oral Paste for Horses — SPC Details

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

Ivermectin is not effective against encysted larval stages of the small
strongyles.
The veterinary medicinal product is administered orally at a single dose rate of
per 100 kg bodyweight (based on the recommended dosage of 200 (0.2
mg/kg). Each syringe delivers 140 mg ivermectin, sufficient to treat 700 kg of
bodyweight. To ensure a correct dosage, body weight should be determined as
accurately as possible. The animal's mouth should be free from food to ensure
swallowing. The tip of the syringe barrel should be inserted at the interdental
space (the gap between the front and back teeth). Immediately elevate the
horse's head for a few seconds to ensure swallowing.
Do not use the same syringe to treat more than one animal unless horses are
running together or in direct contact with each other on the same premises.
For best results all horses in a yard or grazing together should be included in a
regular parasite control programme, with particular attention being paid to
mares, foals and yearlings, and treated at the same time. Foals should be
treated initially at 6-8 weeks of age and routine treatment repeated as
appropriate.
Retreatment should be done according to the epidemiological situation, but not
less than 30 days intervals.
Do not use in cases of hypersensitivity to the active substance or to any of the
excipients.
Do not use in dogs or cats as severe adverse reactions may occur.
Very rare
(<1 animal / 10,000 animals treated, including
isolated reports):
Oedema
;
Pruritus
.
In horses carrying heavy infection of , assumed to be
as a result of death of the parasites. Resolves within a few days but
symptomatic treatment may be advisable.
Reporting adverse events is important. It allows continuous safety monitoring of
a veterinary medicinal product. Reports should be sent, preferably via a
veterinarian, to either the marketing authorisation holder or its local
representative or the national competent authority via the national reporting
system. See the package leaflet for respective contact details.
As with all anthelmintics, a veterinary surgeon should establish appropriate
dosing programmes and stock management to achieve adequate parasite
control and reduce the likelihood of anthelmintic resistance developing.

Special precautions for safe use in the target species:
Not applicable.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals:
Do not smoke or eat while handling the veterinary medicinal product.
Wash hands after use.
Avoid eye contact.
Special precautions for the protection of the environment:
Ivermectin is extremely dangerous to fish and aquatic life. See section 5.5.
Other precautions:
The veterinary medicinal product has been formulated specifically for use in
horses only. Dogs and cats may be adversely affected by the concentration of
ivermectin in the veterinary medicinal product if they are allowed to ingest
spilled paste or have access to used syringes.
Avermectins may not be well tolerated in all non-target species (cases of
intolerance with fatal outcome are reported in dogs, especially Collies, Old
English Sheepdogs and related breeds or crosses, and also in turtles
/tortoises).
interaction
None known.
Do not store above 25 °C.
Keep the container in the outer carton in order to protect from light.
This is a unidose product. Please dispose of after use.
Meat and offal: 34 days.
Not authorised for use in animals producing milk for human consumption.

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.

Medication costs adding up?

Pet insurance can cover prescription medications. Find the right policy for your pet.

Compare insurance

Find cheaper vets near you

Compare vet consultation prices in your area. Save on procedures and get a prescription to buy medications online.