Flectron Fly Ear Tags for Cattle 935 mg
Active ingredient: Cypermethrin Cis 50:Trans 50
Form
Ear tag
Species
Manufacturer
Zoetis UK Limited
VMD MA No.
42058/5164
What it's used for
Nuisance flies: Face fly (Musca autumnalis), Head fly (Hydrotea irritans). Biting flies: Horn fly (Haematobia irritans syn Lyperosia irritans), Stable fly...
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Paying less for Cypermethrin Cis 50:Trans 50
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Flectron Fly Ear Tags for Cattle 935 mg — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
Head fly (Hydrotea irritans).
Biting flies: Horn fly (Haematobia irritans syn Lyperosia irritans),
Stable fly (Stomoxys calcitrans),
Cattle biting fly ( Haematobosca stimulans
While the five fly species listed above constitute the majority found on cattle in
Western Europe, there are many other species both within and outside Europe
against which tags may provide some protection. These include:
Warble (gad) fly (Hypoderma sp),
Horse fly (Tabanus bovinus),
Clegs (),
Screw-worm (Callitroga
Blow fly (Lucilia sp).
Other species reported as forming a minor component of the fly population on cattle
monitored during trials of tags include:
Sweat fly (Morellia simplex
Black fly (Simulium reptans),
Lesser house fly (Fannia coniculars).
The veterinary medicinal product provides protection throughout the fly season. For
maximum benefit they should therefore be applied at the beginning of the season
before fly populations build up. For complete control the entire herd should be
tagged.
One tag per animal is usually sufficient to achieve acceptable levels of fly control.
However, where head and face fly attack is very severe, two tags may be necessary,
one on each ear.
used. This assists application, helps prevent spread of infection, aids hygiene and
promotes healing. Restrain the animal, preferably in a crush, so that the ear can be
reached easily. Position the point of the fixing stud in a central position between the
blood vessels in an area of firm tissue halfway between the head and the tip of the
ear, with the fly tag on the back of the ear. A position between the second and third
rib of the ear is ideal. Thick sections of the ear should be avoided.
Depress the applicator until a click is heard. This means the tag and the fixing are
firmly secured. After fixing, pull the stud and tag firmly apart as far as possible. A
correctly fixed tag will hold firm. Do not push the tag and stud back together, as this
can lead to compression of the ear tissue. The two should swing freely in the ear.
If a tag is lost during the season, it is usually because of poor application. The ear
tags will remain flexible and active for a season.
Tags should be removed at the end of each fly season and before cattle go for
slaughter. The neck of the stud behind the ear can be cut with round-nosed scissors.
The new tag can be applied through the hole left by the previous one the following
season.
Very rare
(<1 animal / 10,000 animals treated,
including isolated reports):
Allergic skin reaction
Skin irritation
Reporting adverse events is important. It allows continuous safety monitoring of a
veterinary medicinal product. Reports should be sent, preferably via a veterinarian, to
either the marketing authorisation holder or the national competent authority via the
national reporting system. See the package leaflet for respective contact details.
Special precautions for safe use in the target species:
The best position for the tag is between the second and third rib of the ear.
The veterinary medicinal product is not recommended for fly control on cattle kept in
feed lots or in animal housing.
For external use only.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Rubber gloves should be worn when handling the veterinary medicinal product. Do
not smoke, eat or drink while handling the product. Do not burn the product as a
harmful vapour can be produced. Wash hands and exposed skin before meals and
after work. Keep away from food and drink including animal feeding stuffs.
Special precautions for the protection of the environment:
Not applicable.
Store in the original container.
Keep the container tightly closed.
Milk: Zero hours.
Tags should be removed before cattle leave the farm for slaughter.
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.
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Other Products Containing Cypermethrin Cis 50:Trans 50
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
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