Skip to content
POM-VPS Prescription Required

Triclafas Drench 5% w/v Oral Suspension

Active ingredient: Triclabendazole

Form

Liquid

Species

Sheep

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4247

What it's used for

The product is a flukicide for the specific treatment and control of the liver fluke (Fasciola hepatica) infections in sheep. When used at the recommended...

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 Triclabendazole

  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

Triclafas Drench 5% w/v Oral Suspension — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

The product is a flukicide for the specific treatment and control of the liver fluke
(Fasciola hepatica) infections in sheep. When used at the recommended dose rate,
the product is effective against all stages of triclabendazole susceptible Fasciola
hepatica from 2 day old early immature forms to adult fluke.
The product is given as an oral drench and is suitable for use through most types of
automatic drenching guns. Shake the container thoroughly before use. If animals
are to be treated collectively rather than individually, they should be grouped

Revised: March 2013
AN: 01565/2012
according to their bodyweight and dosed accordingly, in order to avoid under or
overdosing.
To ensure administration of a correct dose, body weight should be determined as
accurately as possible; accuracy of the dosage device should be checked.
Do not mix with other products.
Recommended dose rate:
of the product per 5kg bodyweight
Example:
Bodyweight Dosage Bodyweight Dosage Up to 10 kg 2 ml 31 - 40 kg 8 ml 10 - 15 kg 3 ml 41- 50 kg 10 ml 16 - 20 kg 4 ml 51 - 60 kg 12 ml 21 - 30 kg 6 ml
For each additional 5kg add 1ml to dose.
DOSING PROGRAMME:
The timing for treatment should be based on epidemiological factors and should be
customised for each individual farm. A dosing programme should be established by
a veterinary professional.
If animals are to be treated collectively rather than individually, they should be
grouped according to their bodyweight and dosed accordingly, in order to avoid
under or overdosing.
Do not use in cases of known hypersensitivity to the active ingredient.
None known
Should not be used in sheep less than 7 weeks old
Care should be taken to avoid the following practises because they increase the
risk of development of resistance and could ultimately result in ineffective therapy:
•
extended period of time.
•
misadministration of the product, or lack of calibration of the dosing device (if any).

Revised: March 2013
AN: 01565/2012
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 triclabendazole has been reported in Fasciola species in small
ruminants in a number of countries, including the EU. Therefore the use of this
product should be based on local (regional, farm) epidemiological information about
susceptibility of trematodes and recommendations on how to limit further selection
for resistance to anthelmintics.
Reduction of snail populations
In addition to therapeutic dosing of animals it is advisable to take measures to
reduce the population of the mud snail, Lymnea truncatula which acts as the
intermediate host for Fasciola hepatica (liver fluke). This can be achieved by
improving drainage. Alternatively, fencing-off wet areas where snails are prevalent,
for example around streams or ponds, will prevent sheep grazing areas of high snail
burdens.

i. Special precautions for use in animals
Only use for liverfluke strains susceptible to triclabendazole. Care must be
taken not to damage the mouth or pharyngeal region when dosing. Clean
drenching equipment before and after use. Shake container before use. Use
unaltered product from the original container.
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
When using the product do not eat, drink or smoke. Wash splashes from
eyes and skin immediately. Take off any contaminated clothing immediately.
Wash hands and exposed skin before meals and after work.
None known
Do not store above 25°C.
Protect from freezing.
Sheep (meat & offal) – 56 days
Not authorised for use in ewes producing milk for human consumption including
during the dry period. Do not use within 1 year prior to the first lambing in ewes
intended to produce milk for human consumption.
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.

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.