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Butox Swish Cattle Pour On

  • 4 x 2.5 litre & 2 x 1 litre Bottles £731.45
  • 250ml Bottle £19.49
  • 1 litre Bottle £64.99
  • 2.5 litre Bottle £159.12

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A truly cost effective way to control the menace of flies and lice over a season. One pour on application protects a cow for 8-10 weeks. Two treatments last a whole season. Nil milk withdrawal. 20 days meat withdrawal. Active ingredient: Deltamethrin. POM-VPS.

Below is the product datasheet. This has been provided by the manufacturer and should always be provided with the medication.


Company name: MSD Animal Health
Address: Walton Manor
Milton Keynes
Telephone: 01908 685685 (Customer Support Centre)
Fax: 01908 685555


Pour on suspension. Each 100 ml contains 0.75 g of deltamethrin.


Control of biting and nuisance flies of cattle, including Haematobia irritans, Hippobosca equina, Stomoxys calcitrans, Musca autumnalis and Musca domestica.
Control of biting and sucking lice of cattle, including Damalinia bovis, Haematopinus eurysternus and Linognathus vituli.

Dosage and administration

For external use only.
Pour on the product along the backline of the animals, from the head to the tail, at the following recommended dose rates:

Indications Dose rate
Control of biting and nuisance flies up to 100 kg: 10 ml
100 - 300 kg: 20 ml
over 300 kg: 30 ml
Control of biting and sucking lice 10 ml per animal irrespective of weight

Flies: a single application provides protection against flies for 8 to 10 weeks depending on the infestation degree, fly species and weather conditions. Treatment should be repeated within 8 – 10 weeks.
Lice: a single application provides protection against lice for 8 to 10 weeks. All in-contact animals must be treated at the same time. A single application is sufficient against lice.

Contra-indications, warnings, etc

Some organo-phosphorous insecticides can reduce metabolism rate and thus enhance deltamethrin toxicity. Therefore, avoid the use of such organo-phosphorous insecticides (consult the supplier). No restrictions apply for use during pregnancy and lactation. Overdose of twice the level of recommended treatments does not include any adverse effects.
Withdrawal periods
Edible tissues – 20 days
Milk – zero hours
Operator warnings
Do not eat, drink or smoke while using the product.
Wash hands and exposed skin before meals and after work.
In case of contact with eyes and skin, wash immediately with water.
In the event of accidental ingestion, seek medical advice immediately.
Wear protective gloves when applying the product or handling recently treated animals.
If clothing becomes heavily contaminated remove and wash before re-use.
This product contains deltamethrin which may produce tingling, itchiness, and blotchy redness on exposed skin. If you feel unwell after working with this product consult your doctor and show this data sheet. Tell your doctor you have been using Butox Swish which contains deltamethrin.
Information for doctors: Advice on clinical management is available from the National Poisons Information Service.
For animal treatment only. Keep out of the reach and sight of children.

Pharmaceutical precautions

Protect from direct sunlight. Keep away from food, drink and animal feeding stuffs. Keep container in outer carton.
Dangerous to fish and other aquatic life. Do not contaminate ponds, waterways or ditches with the product or empty containers.
Dispose of any unused product and empty containers in accordance with guidance from your local waste regulation authority.

Legal category


Packaging Quantities

250 ml and 1 L high-density polyethylene translucent dosing flask, closed by two low density polyethylene screw caps fitted internally with a compressible wad. (“squeeze and pour" bottle).
2.5 L portable polyethylene bottle closed with a polypropylene stopper fitted with a heat-sealable aluminium-polyethylene seal (for use with an applicator gun).
Not all pack sizes may be marketed.

Further information


Marketing authorisation number

Vm 01708/4495.

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21st Jul 2015
C fleet

Can this product be used on horses

John Cousins
  • Veterinary Surgeon

This product should not be used on horses. I would recommend one of the DEET products, which are very effective, though have to be applied more often. There are lots of examples, just put DEET into the search box on our website.