Zermasect Sheep Pour-on Alphacypermethrin 12.5 g/l Pour-on Solution
Active ingredient: Alpha-Cypermethrin
Form
Spot-on
Species
Manufacturer
Zoetis UK Limited
VMD MA No.
42058/5188
What it's used for
For the control and treatment of blow fly strike, on sheep and lambs and for the treatment of lice and ticks on sheep. Reduces the incidence of headfly str...
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Paying less for Alpha-Cypermethrin
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1
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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.
Zermasect Sheep Pour-on Alphacypermethrin 12.5 g/l Pour-on Solution — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.
treatment of lice and ticks on sheep. Reduces the incidence of headfly strike in
sheep and lambs for up to 6 weeks.
25 mls for animals weighing less than 25 kg. The dose is applied using an
adjustable dosing gun fitted with a T-bar with 3 or 4 outlets and is applied directly
onto the wool in a band from the back of the head to the base of the tail. For the
reduction of headfly strike 5mls per animal is applied between the horns,
irrespective of size of the animal.
Blowfly – For the control of blowfly a single application will normally provide 8 to
10 weeks protection. Re-treatment may be necessary after this period. For the
treatment of blowfly strike, a single treatment applied to the effected area will
ensure blowfly larvae are killed.
Revised: January 2025
AN: 02964/2024
Ticks – A single treatment will normally provide control of ticks for 8 to 12 weeks.
Headfly – A single treatment will reduce the incidence for up to 6 weeks.
Lice – A single treatment will normally kill all lice.
DOSAGE (ml)PESTSHEEP (>25KG)LAMBS (<25KG)Blowfly 4025Lice40Ticks40Headfly55
weather.
between 24 and 72 hours, in cattle. However no significant adverse reactions
were recorded with sheep during the field trials for this product.
Discolouration of the fleece may be observed in some sheep from approximately
6 to 8 weeks after treatment.
Revised: January 2025
AN: 02964/2024
i) Special precautions for use in animals
Because alphacypermethrin is retained in the wool grease of the fleece, it is
recommended that the product be applied to sheep with a minimum wool length
of 1.0cm.
ii) Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Wear waterproof apron and boots and impervious gloves when applying the
product and when handling recently treated animals
Use the product in a well-ventilated area
Wash any splashes from the skin and eyes immediately, using plenty of water.
Remove heavily contaminated clothing immediately and wash before re-use
Wash hands and exposed skin with soap and water after treatment and before
eating drinking and smoking.
Store in a dry place.
Store upright in the tightly closed original container.
Protect from direct sunlight.
Do not freeze.
If contents freeze they must be thawed and thoroughly mixed before use.
Store away from food, drink and animal feeding stuffs.
Milk: not for use in sheep producing milk for human consumption.
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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Other Products Containing Alpha-Cypermethrin
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Dysect Cattle Pour-On Solution 15 g/litre
POM-VPSZoetis Belgium S.A.
Dysect Cattle Pour-On Solution 15 g/litre
POM-VPSZoetis UK Limited
Dysect Sheep Pour-on solution 12.5 g/l
POM-VPSZoetis Belgium S.A.
Dysect Sheep Pour-on Solution 12.5 g/l
POM-VPSZoetis UK Limited
Zermasect Sheep Pour-on Alphacypermethrin 12.5 g/l Pour-on Solution
POM-VPSZoetis Belgium S.A.
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