Fly & Lice Spot On Insecticide 1% w/v Cutaneous Solution
Active ingredient: Deltamethrin
Form
Solution
Species
Manufacturer
Zoetis Belgium S.A.
VMD MA No.
60021/3076
What it's used for
As a topical application for the control of lice and flies on cattle; ticks, lice, keds and established blowfly strike on sheep and lice and ticks on lambs...
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Paying less for Deltamethrin
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1
Ask your vet for a written prescription
They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
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The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.
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Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
Fly & Lice Spot On Insecticide 1% w/v Cutaneous Solution — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
and established blowfly strike on sheep and lice and ticks on lambs.
On cattle: for the control of both sucking and biting lice, including
bovis, Solenopotes capillatus, Linognathus vituli and
on all ages of cattle including dairy cattle producing milk for human consumption.
Also as an aid in the control of both biting and nuisance flies including
Haematobia irritans,
irritans.
On sheep: For the control of ticks and of lice and keds and
established blowfly strike.
On lambs: For the control of ticks Ixodes ricinus Bovicola ovis.
Cattle:10 ml
Sheep: 5 ml
Lambs (under 10 kg bodyweight or 1 month of age): 2.5 ml
Revised: May 2025
AN: 00175/2025
Administration: Apply a single dose with the special 'Squeeze 'n' Pour' dispenser
pack or the Fly & Lice Spot On Applicator on one spot on the mid-line of the back
at the shoulders as directed on dispenser or applicator gun pack. For blowfly
strike on sheep, see following specific indication directions.
Lice on cattle
clearance of all lice may take 4 - 5 weeks during which time lice hatch from the
eggs and are killed. A very few lice may survive on a small minority of animals.
Therefore, it may be necessary on rare occasions to re-treat an animal 6 - 8
week later.
Flies on cattle: To control biting and non-biting flies, frequency of treatment will
depend on the numbers and species of flies present. Where horn-flies
predominate, good control can be expected for 4 - 8 weeks. Treatment for fly
control should not be repeated within four weeks.
Ticks on sheep:
control of ticks attaching to animals of all ages, for up to 6 weeks after treatment.
Keds and lice on sheep:
short or long fleece will reduce the incidence of a biting louse or ked infestation
over a 4 - 6 week period after treatment.
N.B. For control of ticks, keds and lice on sheep, the fleece should be parted
and Spot On applied to the skin of the animal.
When using the Fly & Lice Spot On applicator application to the skin can be
achieved by inserting the T bar to separate the fleece and penetrate down to the
skin level before squeezing the applicator handle.
Established blowfly strike on sheep: Apply directly to the maggot infected area
as soon as the fly strike is seen. One application will ensure blowfly larvae are
killed in a short time. In the case of more advanced strike lesions, clipping out of
stained wool before treatment is advisable.
Lice and ticks on lambs:
provide useful control of ticks for up to 6 weeks after treatment, and will reduce
the incidence of biting lice over a 4-6 week period after treatment.
after treatment. This is of no long term detriment to the animal.
Application site reactions, including squamosis and pruritus have been very
rarely seen in cattle during the 48 hours after treatment.
The frequency of adverse reactions is defined using the following convention:
- very rare (less than 1 animal in 10,000 animals treated, including isolated
reports)
For external use only.
(ii) Special precautions to be taken by the person administering the
product to the animal
Wear protective clothing including waterproof apron and boots and
impervious gloves when either applying the product or handling recently
treated animals.
Remove heavily contaminated clothing immediately and wash before use.
Wash splashes from skin immediately with soap and plenty of water.
Wash hands and exposed skin after handling this product and before
meals.
In case of contact with eyes, rinse immediately with plenty of clean,
running water and seek medical advice.
In case of accidental ingestion, wash out mouth immediately with plenty of
water and seek medical advice.
Do not smoke, drink or eat while handling the product.
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 label.
Advice to medical practitioners: Advice on clinical management is
available from the National Poisons Information Service.
feeding stuffs.
Do not store above 25C. Do not freeze.
Cattle (milk) – zero hours
Sheep (meat) – 35 days
The product is contra-indicated for use in ewes producing milk for human
consumption.
Revised: May 2025
AN: 00175/2025
5.
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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