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POM-VPS Prescription Required

Noropraz, 18.7 mg/g + 140.3 mg/g Oral Paste for Horses

Active ingredients: Ivermectin, Praziquantel

Form

Paste

Species

Horses

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4365

What it's used for

Small strongyle: Cyathostomum: Cylicocyclus spp., Cylicostephanus spp., Cylicodontophorus spp., Gyalocephalus spp. (adult and non-inhibited mucosal larvae)...

Full indications, dosage and side effects ↓
View official SPC (PDF)

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  1. 1

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

Prescription required

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Clinical information

Noropraz, 18.7 mg/g + 140.3 mg/g Oral Paste for Horses — SPC Details

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

Small strongyle:
Cyathostomum: Cylicocyclus spp.,
Cylicostephanus spp.,
Cylicodontophorus spp.,
Gyalocephalus spp. (adult and non-inhibited mucosal larvae).
Parascaris: Parascaris equorum
Oxyuris: Oxyuris equi
Trichostrongylus: Trichostrongylus axei (adult),
Strongyloides: Strongyloides westeri (adult),
Habronema: Habronema spp. (adult),
Onchocerca:spp. microfilariae i.e. cutaneous onchocerciasis,
Lungworm: Dietyocaulus arnfieldi (adult and larvae).
Cestodes

Anoplocephala perfoliata
Anoplocephala magna
Paranoplocephala mamillana
Dipteran insects:
Gasterophilus
Single administration.
200 µg of lvermectin and 1.5 mg of Praziquantel per kg of bodyweight
corresponding to 1.07 g of paste per 100 kg bodyweight.
To ensure administration of a correct dosage, bodyweight should be determined
as accurately as possible and the correct syringe division selected, as
underdosing might lead to an increased risk of development of resistance to
anthelmintic drugs.
WeightDosageWeightDosageUp to 100 kg1.070 g401 – 450 kg4.815 g101 – 150 kg1.605 g451 – 500 kg5.350 g151 – 200 kg2.140 g501 – 550 kg5.885 g201 – 250 kg2.675 g551 – 600 kg6.420 g251 – 300 kg3.210 g601 – 650 kg6.955 g301 – 350 kg3.745 g651 – 700 kg7.490 g351 – 400 kg4.280 gThe first division delivers enough paste to treat 50 kg.Each subsequent syringe division delivers enough paste to treat 50 kg of
bodyweight. The syringe should be adjusted to the calculated dosage by setting
the ring on the appropriate place on the plunger.
The syringe contains 7.49 g of paste and delivers sufficient paste to treat 700 kg
of bodyweight at the recommended dose rate.
Directions for useBefore administration, adjust the syringe to the calculated dosage by setting the
ring on the plunger. The paste is administered orally by inserting the nozzle of
the syringe through the interdental space and depositing the required amount of
the paste on the back of the tongue. The animal's mouth should be free of any
food. Immediately after administration, elevate the head of the horse for a few
seconds to ensure the dose is swallowed.
The veterinary surgeon should give advice regarding appropriate dosing
programmes and stock management to achieve adequate parasite control for
both tapeworm and roundworm infestations.
Do not use in foals under 2 weeks of age.Do not use in cases of hypersensitivity to the active substances or to any of the
excipients.
Target species: Horses.
Very rare
(<1 animal / 10,000 animals
treated, including isolated
reports):
Swelling
, Anorexia
,
Itching;
Colic
2, 3
, Diarrhoea
2, 3
,
Allergic reaction
(such as Hypersalivation, Tongue
oedema, Urticaria, Tachycardia, Congested
mucous membranes, Cutaneous oedema)
In horses carrying heavy infection of , assumed to be as a
result of the destruction of large number of microfilariae.
Caused by destruction of parasites in cases of very high levels of infestation.
Mild and transient.
A veterinarian should be consulted if these signs persist.
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 the national competent authority via the
national reporting system. See the package leaflet for respective contact details.
Care should be taken to avoid the following practices because they increase the
risk of development of resistance and could ultimately result in ineffective
therapy:
-Too frequent and repeated use of anthelmintics from the same class, over an
extended period of time.
-Underdosing, which may be due to underestimation of body weight,
misadministration of the product, or lack of calibration of the dosing device.
Suspected clinical cases of resistance to anthelmintics should be further
investigated using appropriate tests (e.g. Faecal Egg Count Reduction Test).
Where the results of the test(s) strongly suggest resistance to a particular
anthelmintic, an anthelmintic belonging to another pharmacological class and
having a different mode of action should be used.
Resistance to ivermectin (an avermectin) has been reported in Parascaris
equorum in horses in a number of countries including in the EU. Therefore the
use of this product should be based on local {regional farm) epidemiological
information about susceptibility of nematodes and recommendations on how to
limit further selection for resistance to anthelmintics. Therefore the use of this
product should be based on local (regional farm) epidemiological information
about susceptibility of nematodes and recommendations on how to limit further
selection for resistance to anthelmintics.
As tapeworm infestation is unlikely to occur in horses before two months of age,
treatment of foals below this age is not considered necessary.

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
Wash hands after use.
Do not eat, drink or smoke while handling this product.Avoid contact with the eyes as the product may cause eye irritation.In case of accidental eye contact rinse immediately with plenty of water.In case of accidental ingestion or eye irritation, seek medical advice and show the
package leaflet or the label to the physician.
Special precautions for the protection of the environment:
Not applicable.
Other precautions:
Avermectins may not be well tolerated in all non target animals. Cases of
intolerance are reported in dogs, especially Collies,
Old English Sheepdogs and
related breeds or crosses, and also in turtles and tortoises.
Dogs and cats should not be allowed to ingest spilled paste or access to used
syringes due to the potential for adverse effects related to ivermectin toxicity.
None known.
Do not store above 25 °C.
After use, replace cap.
Meat & offal: 35 days.
Not authorised for use in horses 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.

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