Fasimec Duo 50 Mg/Ml + 1 Mg/Ml Oral Suspension For Sheep

Revised: September 2016

AN: 00629/2016



Fasimec Duo 50 mg/ml + 1 mg/ml Oral Suspension for Sheep


Active ingredients:

Ivermectin 1 mg/ml

Triclabendazole 50 mg/ml


Methyl parahydroxybenzoate (E218) 1.4 mg/ml

Propyl parahydroxybenzoate 0.5 mg/ml

Benzyl alcohol 5.0 mg/ml

For a full list of excipients, see section 6.1.


Oral suspension Creamcoloured aqueous oral suspension.


4.1 Target Species

For sheep over 3 months of age.

Indication for use

Treatment of mixed trematode (fluke) and nematode or arthropod infections due to gastrointestinal roundworms, lungworms, liver fluke and nasal bots.

Gastrointestinal nematodes (adult and immature):

Haemonchus contortus, Teladorsagia (Ostertagia) circumcincta, Trichostrongylus spp, Cooperia spp, Nematodirus sppincluding N. battus, Strongyloides papillosus, Oesophagostomum spp, and adult Chabertia ovina.

Inhibited larval stages and benzimidazole resistant strains of Haemonchus contortusand Teladorsagia (Ostertagia) circumcinctaare also controlled.

Liver fluke (mature, immature and early immature stages down to less than 1 week of age):

Fasciola hepatica

Lungworms (adult and immature):

Dictyocaulus filaria

Nasal bots (all stages):

Oestrus ovis


Do not use in animals with known hypersensitivity to the active ingredients or any of the excipients.

Special warnings for each target species


Special precautions for use

i. Special precautions for use in animals

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:

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 has been reported in Teladorsagia (Ostertagia) circumcinctain sheep and increasing resistance to triclabendazole has been reported in Fasciolaspecies in small ruminants in a number of countries including the EU.

Therefore the use of this product should be based upon local (regional, farm) epidemiological information about susceptibility of the Teladorsagia (Ostertagia) circumcinctaand trematodes and recommendations on how to limit further selection for resistance to anthelmintics

Extra-label use in dogs should be avoided as severe adverse reactions may occur. In common with other avermectins, certain breeds of dogs, such as Collies are especially sensitive to ivermectin and particular care should be taken to avoid accidental consumption of the product.

ii. Special precautions to be taken by the person administering the medicinal product to animals

People with known hypersensitivity to the active substances should avoid contact with the product. Protective gloves should be worn when handling the veterinary medicinal product.

In case of accidental spillage onto skin or into the eyes wash immediately with water. Take off any contaminated clothes.

Do not eat, drink or smoke whilst handling the product. Wash hands and exposed skin before meals and after work.

iii. Other precautions

Ivermectin is very toxic to aquatic organisms and dung insects.

Adverse reactions

None known.

Use during pregnancy and lactation

The safety of this combination of active ingredients has not been shown during pregnancy or lactation or in animals intended for breeding. No alteration of lactation has been reported for ivermectin and triclabendazole when used as monotherapy in sheep. Therefore it should be used in pregnant/lactating animals only according to a risk:benefit analysis by the responsible veterinarian.

Interaction with other medicinal products and other forms of interaction

No data available.

Amount(s) to be administered and administration route

For oral use.

The dose rate is 0.2 mg ivermectin and 10 mg triclabendazole per kg bodyweight equivalent to 2 ml/10 kg bodyweight.

Bodyweight should be assessed accurately before calculating the dose. The product is for oral administration using a suitably calibrated dosing gun. The container should be shaken thoroughly before use. Drenching equipment should be cleaned before and after 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.

The timing for treatment should be based on epidemiological factors and should be customised for each individual farm. As with other anthelmintics, veterinary advice should be sought on appropriate dosing programmes and stock management to achieve adequate parasite control and reduce the likelihood of resistance developing.

Dosing Table:

Animal Weight

Dose of the product

20 – 25 kg

5 ml

26 – 30 kg

6 ml

31 – 35 kg

7 ml

36 – 40 kg

8 ml

41 – 50 kg

10 ml

51 – 60 kg

12 ml

61 – 70 kg

14 ml

71 – 80 kg

16 ml

81 – 90 kg

18 ml

91 – 100 kg

20 ml


No clinical signs were observed after overdosing 5 times. At 10 times overdosing liver and kidney function may be affected slightly. There is no antidote.

Withdrawal period

Meat and offal: 27 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.


Ivermectin is an endectocidal macrocyclic lactone.

Triclabendazole is an anthelmintic benzimidazole.

ATCvet Code: QP54AA51

5.1 Pharmacodynamic properties

Avermectins interact with glutamate-gated chloride ion channels, to increase membrane permeability to chloride ions, causing irreversible neuromuscular blockade in nematodes and arthropods, followed by paralysis and death.

Triclabendazole interferes with intracellular transport mechanisms and inhibits protein synthesis and is active against the liver fluke Fasciola.

5.2 Pharmacokinetic properties

Ivermectin is readily absorbed and reaches peak plasma concentrations within 1 day. Afterwards plasma concentrations decrease with a half life of up to 5 days.

Triclabendazole is readily absorbed, oxidised to triclabendazole sulfoxide and to triclabendazole sulfone.

Peak plasma concentrations are reached within 2 days. Afterwards plasma concentrations decrease with a half life of about 1.5 days. Both metabolites bind strongly to plasma proteins, particularly albumin. More than 90 % of the dose is excreted in the feces, about 2 % in the urine and less than 1 % in the milk within 10 days.

The inter-individual variability of the kinetics of ivermectin and metabolites of triclabendazole in ovine species is high.


6.1 List of Excipients

Methyl parahydroxybenzoate (E218)
Propyl parahydroxybenzoate
Benzyl alcohol

Microcrystalline cellulose and carmellose sodium

Povidone K30

Propylene glycol

Disodium phosphate dodecahydrate

Purified water

6.2 Incompatibilities

None known.

6.3 Shelf life

Shelf life of the veterinary medicinal product as packaged for sale: 18 months. Shelf life after first opening the immediate packaging: 1 year.

6.4 Special precautions for storage

Store the product in closed original container.

6.5 Nature and composition of immediate packaging

The product is available in the following containers:

0.8, 2.2 and 5.0 litre white high density polyethylene (HDPE) bottles with blue polypropylene screw-on cap with flip-top; 12.0 litre white HDPE container with blue polyethylene screw-cap. 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. Dangerous to fish and other aquatic life. Do not contaminate ponds, waterways or ditches with the product or used container.


Elanco Europe Ltd

Lilly House

Priestley Road



RG24 9NL




20 November 2007


September 2016

Approved: 30 September 2016

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