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Closamectin Pour-On (Ivermectin, Closantle)
Closamectin Pour-On (Ivermectin, Closantle)

Closamectin Pour-On (Ivermectin, Closantle)

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Closamectin Pour-on for cattle is a ready to use pour-on solution that is used in the treatment and control of mixed trematode (fluke) and nematode or arthropod infestations due to roundworms, lungworms, eye worms, warbles, mites and lice. Closamectin Pour-on uses a unique mixture of ivermectin (for the treatment of lice, worms and ticks) and closantel (for the treatment of liver fluke and gastrointestinal roundworm).Closamectin pour-on is highly effective and extremely easy to use compared to injections or drenches. The ease and efficiency of this product will save farmers both time and money.

Active Ingredient: Ivermectin, Closantle

Target Species: Cattle, sheep

Administration Method: Pour-On

Treats and Controls: Gastro-intestinal worm, lungworm,eye worms, warbles, lice, mange mites, immature and mature fluke

Withdrawal Time:58 days for cattle intended for meat and offal, not suitable for cattle producing milk for human consumption.

Dosage for cattle: 1 ml per 10 kg of bodyweight.

Body WeightDose VolumeNumber of full doses per pack:
500ml1 Litre2.5 Litre5 Litre
50kg5 ml1002005001000
100kg10 ml50100250500
150kg15 ml3366166333
200kg20 ml2550125250
250kg25 ml2040100200
300kg30 ml163383166
350kg35 ml142871142
400kg40 ml122562125
450kg45 ml112255111
500kg50 ml102050100
550kg55 ml9184590
600kg60 ml8164183

Always read the label and all enclosed information for Closamectin before administering to animals!

Key Features of Closamectin pour on

  • Ready to use pour-on solution
  • helps treat and control mixed trematode (fluke) and nematode or arthropod infestations
  • Uses a unique mixture of ivermectin  and closantel
  • Highly effective 
  • Extremely easy to use compared to injections or drenches. 

Field Tests

Field tests have shown that Closamectin Pour-on is highly effective in the fight against ostertagia ostertagi

  • Killed 99.8% of adult fluke aged 12 weeks following infection
  • Killed 98.3% of immature fluke aged 7 weeks following infection
  • Killed 95.7% of Cooperia oncophora in field tests
  • Killed 99.5% of Cooperia surnabada in field tests

Closamectin Treatment Regime

It is recomended that treating beef cattle at least twice a year is the most effective way of controlling the fluke problem on your farm. 

Housing: Cattle should be treated at the time of housing or just after housing. A second treatment may be needed if the cattle are housed early or if the area is highly susceptible to contamination.

Turnout:Cattle should be treated at 8 to 10 weeks after turnout. This treatment will kill fluke that have been picked up by cattle as soon as they were turned out. This treatment will also help reduce the reinfection of pastures. 

Outwintering: For cattle who are outwintered a treatment should be given in the late autumn to early winter, a second treatment may be needed in January/February.

Bought in cattle: All bought in livestock should be treated and quarantined for at least 48 hours, this will help protect your herd from infections introduced from new cattle

"Choose Closamectin Pour on… The easy and effective way to treat  fluke, worms and lice."

This product is only licensed for sale within the Republic of Ireland. 

PLEASE NOTE: Only the 5L variation of this product comes with an application gun.


Click here to Download Data Sheet

Summary of Product Characteristics

Closamectin Pour-On Solution for Cattle.


Active ingredient(s)
Ivermectin 5 mg/mL
Closantel (as closantel sodium) 200 mg/mL

Brilliant Blue FCF (E133) 0.1 mg/mL
For a full list of excipients see section 6.1.

Pour-On solution.
A clear blue/green solution.

4.1 Target Species

Active ingredient(s)
Ivermectin 5 mg/mL
Closantel (as closantel sodium) 200 mg/mL

Brilliant Blue FCF (E133) 0.1 mg/mL
For a full list of excipients see section 6.1.

4.2 Indications for use, specifying the target species
For the treatment of mixed trematode (fluke) and nematode or arthropod infestations due to roundworms, lungworms, eyeworms, warbles, mites and lice of cattle.

Gastrointestinal roundworms (adults and fourth stage larvae)
Ostertagia ostertagi (including inhibited O. ostertagi),
Haemonchus placei,
Trichostrongylus axei,
Trichostrongylus colubriformis,
Cooperia spp,
Oesophagostomum radiatum,
Nematodirus helvetianus (adult),
Strongyloides papillosus (adult).

Lungworms (adult and fourth stage larvae)
Dictyocaulus viviparus
Trematodes (adult and late immatures)
Fasciola gigantica
Fasciola hepatica

Treatment of fluke at 12 weeks (mature) >95% efficacy.
Treatment of fluke at 7 weeks (late immature) >95% efficacy.

Eyeworms (adult)
Thelazia spp

Cattle grubs (parasitic stages)
Hypoderma bovis,
Hypoderma lineatum

Linognathus vituli,
Haematopinus eurysternus,
Damalinia bovis

Mange Mites
Chorioptes bovis,
Sarcoptes scabiei var bovis

4.3 Contraindications
Do not use in cases of known hypersensitivity to the active substances.
Do not apply to areas of skin which have mange, scabs or other lesions or to areas contaminated with mud or manure.
Avermectins may not be well tolerated in 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).

4.4 Special warnings for each target species
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 bodyweight, misadministration of the product, or lack of calibration of the dosing device.

The effect of rain on the pour-on formulation at the time of and after application has not been investigated. For maximum effect animals should be kept indoors or undercover following treatment, when there is rain or an imminent risk of rain.
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 tests 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 Cooperia spp in cattle.
Therefore the use of this product should be based on local epidemiological information about the susceptibility of the Cooperia spp and recommendations on how to limit further selection for resistance to anthelmintics.

4.5 Special precautions for use
(i)Special precautions for use in animals:
(ii)Special precautions to be taken by the person administering the veterinary medicinal product to animals:
The veterinary medicinal product may be irritating to human skin and eyes and the user should be careful not to apply it to himself or other persons.
Operators should wear nitrile rubber gloves and boots with a waterproof coat when applying the product.
Protective clothing should be washed after use. If accidental skin contact occurs, wash the affected area immediately with soap and water.
If accidental eye exposure occurs, flush the eyes immediately with water and get medical attention.
Do not smoke or eat whilst handling the product. Wash hands after use. Use only in well ventilated areas or outdoors.

(iii)Other Precautions Regarding the Environment.
Treated cattle should not have direct access to ponds, streams or ditches for 14 days after treatment.

4.6 Adverse reactions (frequency and seriousness)
Undesirable effects are not expected when the product is used at the recommended dose rate

4.7 Use during pregnancy, lactation or lay
The product is safe for use during pregnancy and lactation.
However, the product is not permitted for use in animals
producing milk for human consumption, including pregnant animals intended to produce milk for human consumption.

4.8 Interaction with other medicinal products and other forms of interaction
None known.

4.9 Amounts to be administered and administration route
The veterinary medicinal product should be administered topically at a dosage rate of 500μg ivermectin per kg bodyweight and 20 mg closantel per kg bodyweight (1 mL per 10 kg).

The formulation should be applied along the midline of the back in a narrow strip between the withers and the tail head.
Assess bodyweight carefully prior to administration.
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.
* Dose rate 1 ml per 10 kg bodyweight

4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary
At doses of three times the recommended dose, no significant clinical signs were recorded.

No antidote has been identified. Symptomatic treatment may be beneficial.

like other salicylanilides is a potent uncoupler of oxidative phosphorylation and the safety index is not as high as is the case of many other anthelmintics.
However where used as directed there are unlikely to be any untoward effects.
Signs of overdosage can include
slight loss of appetite,
loose faeces,
decreased vision and
increased frequency of defecation.
High doses may cause
general weakness and inco-ordination,

tachycardia and
in extreme cases death.
Treatment of overdosage is symptomatic as no antidote has been identified.

4.11 Withdrawal Period(s)
Cattle must not be treated within 28 days of slaughter for human consumption.
Not permitted for use in animals producing milk for human consumption, including pregnant animals intended to
produce milk for human consumption.


ATC Vet Code:

Pharmacotherapeutic Group:
Ivermectin, combinations.


BodyweightDose Volume250 ml 500 ml 1 Litre2.5 Litres5 Litres
100 kg10 ml2550100250500
150 kg15 ml163366166333
200 kg20 ml122550125250
250 kg25 ml102040  
300 kg30 ml8163383166
350 kg35 ml7142871142
400 kg40 ml6122562125
450 kg45 ml5112255111
500 kg50 ml5102050100
550 kg55 ml49184590

5.1 Pharmacodynamic properties
is an endectocide with activity against a wide range of internal and external parasites.
Ivermectin is a macrocylic lactone and acts by inhibiting nerve impulses.
It binds selectively and with high affinity to glutamate-gated chloride ion channels which occur in invertebrate nerve and muscle cells.
This leads to an increase in the permeability of the cell membrane to chloride ions with hyperpolarization of the nerve or muscle cell, resulting in paralysis and death of the relevant parasites.
Compounds of this class may also interact with other ligand-gated chloride channels, such as those gated by the neurotransmitter gammaaminobutyric acid (GABA).
The margin of safety for compounds of this class is attributable to the fact that mammals do not have glutamate-gated chloride channels.
The macrocylic lactones have a low affinity for other mammalian ligand-gated chloride channels and they do not readily cross the blood-brain barrier.

Closantel is a member of the salicylanilide class of anthelmintics. Salicylanilides are hydrogen (proton) ionophores (referred to as oxidative phosphorylase uncouplers.)
The chemical structure of salicylanilides illustrate the possession of a detachable proton. This type of molecule is lipophilic and is known to shuttle protons across membranes, in particular the inner mitochondrial membrane. Closantel acts by uncoupling oxidative phosphorylation.
Closantel is a parasiticide with flukicide activity and efficacy against certain other helminths and arthropods.

5.2 Pharmacokinetic properties
After topical administration of Closamectin Pour-On to cattle at a dose rate of 500 microgram ivermectin per kg and 20 mg closantel per kg the following parameters were observed:

Ivermectin – Cmax of 19.13 ng/mL and AUC of 2440;
Closantel – Cmax of 68.5 microgram/mL and AUC of 35207

Ivermectin is only partially metabolised. In cattle, only about 1 to 2% is excreted in the urine the remainder is excreted in the faeces, approximately 60% of which is excreted as unaltered drug. The remainder is excreted as metabolites or degradation products. Salicylanilides are poorly metabolised and are excreted mainly unchanged. About 90% of closantel is excreted unchanged in the faeces and urine in cattle.

6.1 List of excipients
Brilliant Blue FCF (E133) Dye
Anhydrous Ethanol
Cetearyl Ethylhexanoate
Isopropyl Myristate
Denatonium Benzoate

6.2 Incompatibilities
None known.

6.3 Shelf-life
Shelf-life of the veterinary medicinal product as packaged for sale: 1 year.

6.4 Special precautions for storage
Do not store above 25°C.
Store upright in original container.
Protect from light.
Discard unused material. Avoid introduction of contamination.
If stored at temperatures below 0°C, Closamectin Pour-On Solution for Cattle may appear cloudy. Allowing to warm at room temperature will restore the normal appearance without affecting efficacy.
Flammable – keep away from heat, sparks, open flame or other sources of ignition.

6.5 Nature and composition of immediate packaging
Translucent 250 mL and 1L HDPE containers with white HDPE caps and
white 1L, 2.5L and 5L HDPE backpacks with white polypropylene screw caps.
Not all packs sizes may be marketed.

6.6 Special precautions for the disposal of unused veterinary medicinal products or waste materials

Do not contaminate surface waters or ditches with
the product or used container.
Any unused product or waste material should be disposed of in accordance with national requirements.

Norbrook Laboratories Limited
Station Works
Camlough Road
Co Down,
BT35 6JP
Northern Ireland

VPA 10999/124/001

7th August 2009

5th May 2010

Delivery Information

Delivery Service

Here at Agridirect we have joined forces with DPD to ensure all packages are delivered promptly and safely to you. We ship to all mainland countries within the EU. Deliveries take place Monday to Friday excluding bank holidays. Once your order has been dispatched from our warehouse you will be notified by email. If there is a delay with your order for any reason you will be contacted immediately. 

Due to Brexit we are temporarily unable to ship to the UK. Shipping to Northern Ireland will remain in place.

Delivery Times
Ireland (ROI & NI)EU (Mainland Only)
2-4 Working Days4-6 Working Days

Some product have an extended delivery time, this is noted on the products.

Delivery Rates

CountryOrders Under €99Orders Over €99
Ireland (ROI & NI)€6.99€0.00
Czech Republic€19.99€13.00


A selection of the products we sell are only licensed for sale within the Republic Of Ireland and can not be shipped outside of the country. These products are noted as only being available within the Republic of Ireland on the individual product pages.

There may be an addition charge on certain bulky items. This charge will be clearly marked on an applicable products and will be explained on the checkout page before payment has been made.

Agridirect Returns Policy

We’re sorry your purchase didn’t work out. But don’t worry; we have a great returns policy to help you out, plus returns are free.

All purchases can be returned to us within 14 days of delivery and returned goods must be received within 14 days from the date you informed us of the return.

Purchases may be opened for inspection but must not be used and must be repackaged securely in the original packaging if you wish to return it.

If we discover goods have been used or there has been a loss in value of the goods due to damage to the goods, while in your care or whilst being returned to us, we will reduce the amount refunded, which may amount to the full cost of the product, to cover loss of value of goods.

All returns should be complete which includes boxes, manuals and accessories that may have been included with the order.

All returns must be packaged appropriately for shipping, we will not accept responsibility for damages or loss which occur during shipping of a return product.

We accept no responsibility for goods damaged or lost while in transit to us. 

How do I return a product?

Making returns to us are free, simply follow the steps below and bring your package to an official DPD pickup point.

  • All returns must be accompanied with a fully filled out returns form which can be downloaded here.
  • To print off your return label click here or visit and follow the on-screen instructions. Make sure and use your order number as your reference.
  • Bring your package to a DPD pickup point. To find your nearest drop off point here.

Once the returned product has been received into our warehouse and been fully inspected a refund will be issued.

For the return of bulk products please contact us at

I have received a damaged product from you, what should I do?

First off, if you have received a damaged electrical product from us, do not plug it in. Any electrical products that are plugged in are deemed ‘as used and accepted’ and are not accepted as returns. All damages must be reported to us via phone or email within 24hours of receipt of goods. Please ensure you check your items upon delivery.

How do I begin the returns process?

If you wish to begin the return process, please email us at and ensure the following information is included in your email. Your name, phone number, Order id, the item you wish to return, reason for return and if the product is damaged we require photos of the product.

Once you have sent us all required information a member of our team will assess your claim and will contact you as soon as possible. Please hold off on returning products until a member of our team has called you to confirm.


Once the returned product has been returned to us and fully inspected a refund will be issued.

Please Note: A typical timeline for a refund to show in your account is up to 10 working days from the date processed, depending on your bank.

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