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Norbrook Flukicide Triclafas

Norbrook Flukicide Triclafas
2.5 litre Bottle

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  • 2.5 litre Bottle £62.50
  • 5 litre Bottle £101.50

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£62.50 to £101.50


A flukicide for the specific treatment and control of Fasciola hepatica / Liver Fluke infections in sheep. POM-VPS.



Triclafas Drench 5% w/v Oral Suspension


Active Substance:

Triclabendazole 5% w/v


Propyl Parahydroxybenzoate 0.04% w/v (as preservative)

Methyl Parahydroxybenzoate 0.11% w/v (as preservative)

For a full list of excipients, see section 6.1


Oral suspension

A white to off-white suspension


4.1 Target species


4.2 Indications for use, specifying the target species

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.

4.3 Contraindications

Do not use in cases of known hypersensitivity to the active ingredient.

4.4 Special Warnings for each target species

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:

  • 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 (if any).

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.

4.5 Special precautions for use

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.

4.6 Adverse reactions (frequency and seriousness)

None known

4.7 Use during pregnancy, lactation or lay

The product can be safely given to pregnant sheep.

4.8 Interaction with other medicinal products and other forms of interaction

None known

4.9 Amounts to be administered and administration route

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 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: 10 mg triclabendazole per kilogram bodyweight i.e. 1ml of the product per 5kg bodyweight






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.


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.

4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary

Triclafas Drench is well tolerated at five times the recommended dose rate.

Triclabendazole overdosage may produce transient inappetance and loss of bodyweight.

4.11 Withdrawal period

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.


Pharmacotherapeutic group: Anthelmintics, benzimadazoles and related substances.

ATC Vet Code: QP52AC01

5.1 Pharmacodynamic properties

The product contains triclabendazole, a benzimidazole anthelmintic used in food animals, it differs from other benzimidazoles in that it is narrow spectrum. The drug accumulates significantly in both immature and adult stages of Fasciola hepatica and stimulates the major routes of the parasite energy generating system, as demonstrated by glucose derived acetate and propionate formation. However, under these conditions the parasites motility decreased, indicating that the drug is not associated with inhibition of the energy generating pathways. Triclabendazole inhibits colchicine binding to microtubular proteins suggesting interference of the drug with microtubular structure and function. The drug strongly inhibits the release of proteolytic enzymes in immature and adult parasites, a process dependent on microtubular functions. The precise molecular mode of action of this fasciolicidal drug remains to be elucidated.

5.2 Pharmacokinetic properties

After oral administration, triclabendazole is rapidly metabolised to its sulphoxide and sulphone metabolites. The sulphoxide is thought to be the active moiety. In sheep the sulphoxide and sulphone metabolites reached a Cmax of approximately 10 μg/ml and 7 μg/ml at 29 hours and 48 hours, respectively. The vast majority of oral dose triclabendazole is eliminated in faeces after 7 days. Urinary excretion is minimal.


6.1 List of excipients

Propyl Parahydroxybenzoate

Methyl Parahydroxybenzoate

Microcrystalline Cellulose and Carboxymethyl Cellulose Sodium (89:11 ratio)

Povidone K30

Sodium Phosphate Dihydrate


Phosphoric Acid 85% w/w (for pH adjustment)

Purified Water

6.2 Incompatibilities

None known

6.3 Shelf life

Shelf life of the veterinary medicinal product as packaged for sale: 2 years

6.4 Special precautions for storage

Do not store above 25°C.

Protect from freezing.

6.5 Nature and composition of immediate packaging

1 litre, 2.5 litre and 5 litre white, opaque, high density, flat bottomed polyethylene flexipack with white polypropylene screw fit cap and induction seal. The use orientation is inverted.

Not all pack sizes may be marketed

6.6 Special precautions for the disposal of unused veterinary medicinal product or waste materials derived from the use of such products

Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal products should be disposed of in accordance with local requirements.

Do not contaminate ponds, waterways or ditches with the product or used container.


Norbrook Laboratories Limited

Station Works

Camlough Road


Co. Down, BT35 6JP


Vm 02000/4247


Date: 6 January 2011


Date: March 2013

Approved: 04 April 2013

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products, such as Insulin, are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. To find the exact cost of shipping your item, and to see all options available, follow these steps:

  1. Put the items you wish to order in your basket
  2. Proceed to checkout and enter your delivery address, including country
  3. Delivery information including price will automatically update to what is available to you

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as insulin and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.


Q & A

Below are some recent questions we've received regarding Norbrook Flukicide Triclafas, including answers from our team.

6 December 2016 at 6:19pm

How soon should the stench be used once opened?


  • VioVet customer since 2015
  • From: West Yorkshire, United Kingdom

Once the bottle of drench has been opened, how soon should it be used before it requires disposal?

  • Veterinary Advisor

I have spoken with Norbrook who advised that there is no data to suggest that once opened Triclafas will not be effective up to the expiry date on the bottle. However they do recommend that disposal after 6 months of opening if not used should be adhered to with most veterinary products such as this.