POM-VPS
Prescription Required
Vectocert 1.25 % w/v Pour-on Solution for Sheep
Active ingredient: Cypermethrin Cis 80:Trans 20
Form
Spot-on
Species
Sheep
Manufacturer
Bimeda Animal Health Limited
VMD MA No.
50146/4037
What it's used for
For the treatment and control of headflies, and treatment of ticks and biting lice in sheep. For the prevention and treatment of blowfly strike in sheep.
Full indications, dosage and side effects ↓The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.
Paying less for Cypermethrin Cis 80:Trans 20
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Prescription required
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Clinical information
Vectocert 1.25 % w/v Pour-on Solution for Sheep — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.
For the treatment and control of headflies, and treatment of ticks and biting lice
in sheep. For the prevention and treatment of blowfly strike in sheep.
in sheep. For the prevention and treatment of blowfly strike in sheep.
On completion of each treatment cycle of the product and before the dosing gun
is stored, immediately expel any remaining product in the dosing gun.
Administer by means of the recommended applicator gun as follows:
Blowflies
Prevention of blowfly strike
Bodyweight Dose Doses per litre
Up to 25 kg* 20 ml 50
25 to 40 kg 30 ml 33
Over 40 kg 40 ml 25
*Do not administer to animals of less than 12.5 kg bodyweight.
Apply as a fan-spray to the surface of the fleece on the back and hindquarters of
the sheep using the Pour-On Gun fitted with the fan-spray nozzle. Half the dose
should be applied to the shoulders, back and flanks, and half to the rump. The
distance between the nozzle and the fleece should be approximately 20 cm.
Each dose will require 2 or 3 sweeps to apply. THE PRODUCT WILL PREVENT
Revised: October 2018
AN: 00833/2018Page 4 of 7
BLOWFLY STRIKE ONLY ON AREAS COVERED BY SPRAY. One application
will give 6-8 weeks protection. Re-treat as required.
Treatment of blowfly strike
Apply directly to all the affected parts at the rate of 2.5 ml per 100 –150 cm
(roughly the size of a hand). The T-bar nozzle should be used. Most strikes will
require 5-10 ml. Ensure that all affected parts are treated. A single application
is sufficient to ensure that larvae are expelled and killed within a few hours.
Lice: 5 ml per 20 kg bodyweight up to a maximum of 20 ml.
Bodyweight Dose Doses per litre
Up to 20 kg 5 ml 200
21 to 40 kg 10 ml 100
41 to 60 kg 15 ml 66
Over 60 kg 20 ml 50
Using the straight nozzle on the applicator gun, apply as a pin-stream from the
shoulders to the rump along the middle of the backline.
Sheep may be treated off-shears or at any time during the year.
Revised: October 2018
AN: 00833/2018Page 5 of 7
Ticks: Adult sheep and lambs greater than 10 kg: 10 ml per 20 kg bodyweight,
up to a maximum of 40 ml. Lambs under 10 kg: 5 ml followed 3 weeks later by a
10 ml application.
Bodyweight Dose Doses per litre
Up to 10 kg 5 ml 200
11 to 20 kg 10 ml 100
21 to 40 kg 20 ml 50
41 to 60 kg 30 ml 33
Over 60 kg 40 ml 25
Using the straight nozzle on the Pour-On Gun, apply as a pin-stream from the
crown of the head to the top of the rump.
Headflies: 5 ml per animal irrespective of size.
Apply to the top of the head between the ears using the T-bar nozzle.
Take care not to apply product in the sheep’s eyes.
One application before the start of the headfly season will give up to 4 weeks
protection. Re-treat as required.
This product contains a blue dye to aid in the identification of treated animals.
The colour is temporary and will fade from the fleece within 48 hours of
application.
Overdose
Toxic signs in mammals are tremors, hyperexcitability, salivation,
choreoathetosis and paralysis, rarely leading to death. Usually, the signs
disappear rapidly and the animals recover, generally within a week.
Revised: October 2018
AN: 00833/2018Page 6 of 7
There is no specific antidote but symptomatic therapy can be given if considered
necessary.
is stored, immediately expel any remaining product in the dosing gun.
Administer by means of the recommended applicator gun as follows:
Blowflies
Prevention of blowfly strike
Bodyweight Dose Doses per litre
Up to 25 kg* 20 ml 50
25 to 40 kg 30 ml 33
Over 40 kg 40 ml 25
*Do not administer to animals of less than 12.5 kg bodyweight.
Apply as a fan-spray to the surface of the fleece on the back and hindquarters of
the sheep using the Pour-On Gun fitted with the fan-spray nozzle. Half the dose
should be applied to the shoulders, back and flanks, and half to the rump. The
distance between the nozzle and the fleece should be approximately 20 cm.
Each dose will require 2 or 3 sweeps to apply. THE PRODUCT WILL PREVENT
Revised: October 2018
AN: 00833/2018Page 4 of 7
BLOWFLY STRIKE ONLY ON AREAS COVERED BY SPRAY. One application
will give 6-8 weeks protection. Re-treat as required.
Treatment of blowfly strike
Apply directly to all the affected parts at the rate of 2.5 ml per 100 –150 cm
(roughly the size of a hand). The T-bar nozzle should be used. Most strikes will
require 5-10 ml. Ensure that all affected parts are treated. A single application
is sufficient to ensure that larvae are expelled and killed within a few hours.
Lice: 5 ml per 20 kg bodyweight up to a maximum of 20 ml.
Bodyweight Dose Doses per litre
Up to 20 kg 5 ml 200
21 to 40 kg 10 ml 100
41 to 60 kg 15 ml 66
Over 60 kg 20 ml 50
Using the straight nozzle on the applicator gun, apply as a pin-stream from the
shoulders to the rump along the middle of the backline.
Sheep may be treated off-shears or at any time during the year.
Revised: October 2018
AN: 00833/2018Page 5 of 7
Ticks: Adult sheep and lambs greater than 10 kg: 10 ml per 20 kg bodyweight,
up to a maximum of 40 ml. Lambs under 10 kg: 5 ml followed 3 weeks later by a
10 ml application.
Bodyweight Dose Doses per litre
Up to 10 kg 5 ml 200
11 to 20 kg 10 ml 100
21 to 40 kg 20 ml 50
41 to 60 kg 30 ml 33
Over 60 kg 40 ml 25
Using the straight nozzle on the Pour-On Gun, apply as a pin-stream from the
crown of the head to the top of the rump.
Headflies: 5 ml per animal irrespective of size.
Apply to the top of the head between the ears using the T-bar nozzle.
Take care not to apply product in the sheep’s eyes.
One application before the start of the headfly season will give up to 4 weeks
protection. Re-treat as required.
This product contains a blue dye to aid in the identification of treated animals.
The colour is temporary and will fade from the fleece within 48 hours of
application.
Overdose
Toxic signs in mammals are tremors, hyperexcitability, salivation,
choreoathetosis and paralysis, rarely leading to death. Usually, the signs
disappear rapidly and the animals recover, generally within a week.
Revised: October 2018
AN: 00833/2018Page 6 of 7
There is no specific antidote but symptomatic therapy can be given if considered
necessary.
Not to be used in lambs less than one week old.
For the prevention of blowfly strike; do not administer to animals of less than
12.5 kg bodyweight.
Avoid treating very young lambs if the weather is unseasonably hot.
For the prevention of blowfly strike; do not administer to animals of less than
12.5 kg bodyweight.
Avoid treating very young lambs if the weather is unseasonably hot.
None known.
None
Revised: October 2018
AN: 00833/2018Page 2 of 7
i) Special precautions for use in animals
Vectocert 1.25% w/v Pour-On Solution for Sheep minimises mothering-up
problems after treatment. However, care must be taken not to apply the product
right to the lamb’s tail, as a ewe recognises a young lamb partly by the smell of
the tail area.
Blowflies are attracted by dirty, damp wool or open wounds. The more common
site for fly strike is the rump due to soiling caused by diarrhoea and urine
staining. The efficacy of Vectocert 1.25% w/v Pour-On is reduced in the
presence of soiled or dirty wool. Therefore, sheep must be crutched (dagged)
regularly and appropriate worm control measures employed.
Take care not to apply product in the sheep’s eyes. This precaution should be
observed particularly when treating breeds with little wool on their heads.
Full operating and maintenance instructions, including details on the use of
nozzles are supplied with each applicator gun. Please read carefully before use.
Maintain applicator gun carefully to ensure accurate dosage.
For external use only.
ii) Special Precautions to be taken by the person administering the product to
animals
This product is harmful if swallowed and may cause skin, eye or respiratory
irritation. This product may also cause hypersensitivity (allergic) reactions.
People with known hypersensitivity to cypermethrin should avoid contact with the
product.
Handle this product with great care to avoid accidental exposure.
Wear eye protection, protective clothing, rubber gloves and boots when applying
the product.
Make sure when attaching the recommended applicator gun onto the container
that the coiled retainer is secured onto the cap and the applicator.
Wear a disposable mask when applying as a fan-spray for the prevention of
blowfly-strike.
Use in a well-ventilated area and avoid inhaling the vapour.
Do not eat, drink or smoke whilst using the product.
Wash splashes from skin and eyes immediately with plenty of clean water. If
irritation persists seek medical advice immediately and show the package leaflet
to the physician.
Remove contaminated clothing immediately and wash exposed skin with plenty
of clean water.
Revised: October 2018
AN: 00833/2018Page 3 of 7
Wash hands and exposed skin before eating, drinking or smoking and after
work.
In case of accidental ingestion or mouth contact, immediately rinse the mouth
with plenty of water and seek medical advice.
Avoid handling treated animals.
iii) Other precautions
As a precautionary measure sheep must be kept away from watercourses for at
least one hour following treatment (see section 5.3, ‘Environmental properties’).
Revised: October 2018
AN: 00833/2018Page 2 of 7
i) Special precautions for use in animals
Vectocert 1.25% w/v Pour-On Solution for Sheep minimises mothering-up
problems after treatment. However, care must be taken not to apply the product
right to the lamb’s tail, as a ewe recognises a young lamb partly by the smell of
the tail area.
Blowflies are attracted by dirty, damp wool or open wounds. The more common
site for fly strike is the rump due to soiling caused by diarrhoea and urine
staining. The efficacy of Vectocert 1.25% w/v Pour-On is reduced in the
presence of soiled or dirty wool. Therefore, sheep must be crutched (dagged)
regularly and appropriate worm control measures employed.
Take care not to apply product in the sheep’s eyes. This precaution should be
observed particularly when treating breeds with little wool on their heads.
Full operating and maintenance instructions, including details on the use of
nozzles are supplied with each applicator gun. Please read carefully before use.
Maintain applicator gun carefully to ensure accurate dosage.
For external use only.
ii) Special Precautions to be taken by the person administering the product to
animals
This product is harmful if swallowed and may cause skin, eye or respiratory
irritation. This product may also cause hypersensitivity (allergic) reactions.
People with known hypersensitivity to cypermethrin should avoid contact with the
product.
Handle this product with great care to avoid accidental exposure.
Wear eye protection, protective clothing, rubber gloves and boots when applying
the product.
Make sure when attaching the recommended applicator gun onto the container
that the coiled retainer is secured onto the cap and the applicator.
Wear a disposable mask when applying as a fan-spray for the prevention of
blowfly-strike.
Use in a well-ventilated area and avoid inhaling the vapour.
Do not eat, drink or smoke whilst using the product.
Wash splashes from skin and eyes immediately with plenty of clean water. If
irritation persists seek medical advice immediately and show the package leaflet
to the physician.
Remove contaminated clothing immediately and wash exposed skin with plenty
of clean water.
Revised: October 2018
AN: 00833/2018Page 3 of 7
Wash hands and exposed skin before eating, drinking or smoking and after
work.
In case of accidental ingestion or mouth contact, immediately rinse the mouth
with plenty of water and seek medical advice.
Avoid handling treated animals.
iii) Other precautions
As a precautionary measure sheep must be kept away from watercourses for at
least one hour following treatment (see section 5.3, ‘Environmental properties’).
The product must be applied only with the recommended applicator gun, as the
product may have a detrimental effect on certain components of conventional
dosing guns.
product may have a detrimental effect on certain components of conventional
dosing guns.
Do not store above 25°C.
Protect from direct sunlight.
Keep the container tightly closed.
Store away from food, drink, and animal feeding stuffs.
Protect from direct sunlight.
Keep the container tightly closed.
Store away from food, drink, and animal feeding stuffs.
None known.
4.7 Use during pregnancy or lactation
No restrictions. Pregnant ewes must be handled with care.
4.8 Interaction with other medicinal products and other forms of interaction
The product must be applied only with the recommended applicator gun, as the
product may have a detrimental effect on certain components of conventional
dosing guns.
4.9 Amounts to be administered and administration route
On completion of each treatment cycle of the product and before the dosing gun
is stored, immediately expel any remaining product in the dosing gun.
Administer by means of the recommended applicator gun as follows:
Blowflies
Prevention of blowfly strike
Bodyweight Dose Doses per litre
Up to 25 kg* 20 ml 50
25 to 40 kg 30 ml 33
Over 40 kg 40 ml 25
*Do not administer to animals of less than 12.5 kg bodyweight.
Apply as a fan-spray to the surface of the fleece on the back and hindquarters of
the sheep using the Pour-On Gun fitted with the fan-spray nozzle. Half the dose
should be applied to the shoulders, back and flanks, and half to the rump. The
distance between the nozzle and the fleece should be approximately 20 cm.
Each dose will require 2 or 3 sweeps to apply. THE PRODUCT WILL PREVENT
Revised: October 2018
AN: 00833/2018Page 4 of 7
BLOWFLY STRIKE ONLY ON AREAS COVERED BY SPRAY. One application
will give 6-8 weeks protection. Re-treat as required.
Treatment of blowfly strike
Apply directly to all the affected parts at the rate of 2.5 ml per 100 –150 cm
(roughly the size of a hand). The T-bar nozzle should be used. Most strikes will
require 5-10 ml. Ensure that all affected parts are treated. A single application
is sufficient to ensure that larvae are expelled and killed within a few hours.
Lice: 5 ml per 20 kg bodyweight up to a maximum of 20 ml.
Bodyweight Dose Doses per litre
Up to 20 kg 5 ml 200
21 to 40 kg 10 ml 100
41 to 60 kg 15 ml 66
Over 60 kg 20 ml 50
Using the straight nozzle on the applicator gun, apply as a pin-stream from the
shoulders to the rump along the middle of the backline.
Sheep may be treated off-shears or at any time during the year.
Revised: October 2018
AN: 00833/2018Page 5 of 7
Ticks: Adult sheep and lambs greater than 10 kg: 10 ml per 20 kg bodyweight,
up to a maximum of 40 ml. Lambs under 10 kg: 5 ml followed 3 weeks later by a
10 ml application.
Bodyweight Dose Doses per litre
Up to 10 kg 5 ml 200
11 to 20 kg 10 ml 100
21 to 40 kg 20 ml 50
41 to 60 kg 30 ml 33
Over 60 kg 40 ml 25
Using the straight nozzle on the Pour-On Gun, apply as a pin-stream from the
crown of the head to the top of the rump.
Headflies: 5 ml per animal irrespective of size.
Apply to the top of the head between the ears using the T-bar nozzle.
Take care not to apply product in the sheep’s eyes.
One application before the start of the headfly season will give up to 4 weeks
protection. Re-treat as required.
This product contains a blue dye to aid in the identification of treated animals.
The colour is temporary and will fade from the fleece within 48 hours of
application.
Overdose
Toxic signs in mammals are tremors, hyperexcitability, salivation,
choreoathetosis and paralysis, rarely leading to death. Usually, the signs
disappear rapidly and the animals recover, generally within a week.
Revised: October 2018
AN: 00833/2018Page 6 of 7
There is no specific antidote but symptomatic therapy can be given if considered
necessary.
4.10 Withdrawal Periods
Meat and offal: 8 days.
Milk: Not to be administered to animals producing milk for human consumption.
5.
4.7 Use during pregnancy or lactation
No restrictions. Pregnant ewes must be handled with care.
4.8 Interaction with other medicinal products and other forms of interaction
The product must be applied only with the recommended applicator gun, as the
product may have a detrimental effect on certain components of conventional
dosing guns.
4.9 Amounts to be administered and administration route
On completion of each treatment cycle of the product and before the dosing gun
is stored, immediately expel any remaining product in the dosing gun.
Administer by means of the recommended applicator gun as follows:
Blowflies
Prevention of blowfly strike
Bodyweight Dose Doses per litre
Up to 25 kg* 20 ml 50
25 to 40 kg 30 ml 33
Over 40 kg 40 ml 25
*Do not administer to animals of less than 12.5 kg bodyweight.
Apply as a fan-spray to the surface of the fleece on the back and hindquarters of
the sheep using the Pour-On Gun fitted with the fan-spray nozzle. Half the dose
should be applied to the shoulders, back and flanks, and half to the rump. The
distance between the nozzle and the fleece should be approximately 20 cm.
Each dose will require 2 or 3 sweeps to apply. THE PRODUCT WILL PREVENT
Revised: October 2018
AN: 00833/2018Page 4 of 7
BLOWFLY STRIKE ONLY ON AREAS COVERED BY SPRAY. One application
will give 6-8 weeks protection. Re-treat as required.
Treatment of blowfly strike
Apply directly to all the affected parts at the rate of 2.5 ml per 100 –150 cm
(roughly the size of a hand). The T-bar nozzle should be used. Most strikes will
require 5-10 ml. Ensure that all affected parts are treated. A single application
is sufficient to ensure that larvae are expelled and killed within a few hours.
Lice: 5 ml per 20 kg bodyweight up to a maximum of 20 ml.
Bodyweight Dose Doses per litre
Up to 20 kg 5 ml 200
21 to 40 kg 10 ml 100
41 to 60 kg 15 ml 66
Over 60 kg 20 ml 50
Using the straight nozzle on the applicator gun, apply as a pin-stream from the
shoulders to the rump along the middle of the backline.
Sheep may be treated off-shears or at any time during the year.
Revised: October 2018
AN: 00833/2018Page 5 of 7
Ticks: Adult sheep and lambs greater than 10 kg: 10 ml per 20 kg bodyweight,
up to a maximum of 40 ml. Lambs under 10 kg: 5 ml followed 3 weeks later by a
10 ml application.
Bodyweight Dose Doses per litre
Up to 10 kg 5 ml 200
11 to 20 kg 10 ml 100
21 to 40 kg 20 ml 50
41 to 60 kg 30 ml 33
Over 60 kg 40 ml 25
Using the straight nozzle on the Pour-On Gun, apply as a pin-stream from the
crown of the head to the top of the rump.
Headflies: 5 ml per animal irrespective of size.
Apply to the top of the head between the ears using the T-bar nozzle.
Take care not to apply product in the sheep’s eyes.
One application before the start of the headfly season will give up to 4 weeks
protection. Re-treat as required.
This product contains a blue dye to aid in the identification of treated animals.
The colour is temporary and will fade from the fleece within 48 hours of
application.
Overdose
Toxic signs in mammals are tremors, hyperexcitability, salivation,
choreoathetosis and paralysis, rarely leading to death. Usually, the signs
disappear rapidly and the animals recover, generally within a week.
Revised: October 2018
AN: 00833/2018Page 6 of 7
There is no specific antidote but symptomatic therapy can be given if considered
necessary.
4.10 Withdrawal Periods
Meat and offal: 8 days.
Milk: Not to be administered to animals 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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Same active ingredient
Other Products Containing Cypermethrin Cis 80:Trans 20
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Crovect 1.25% w/v Pour-on Solution for Sheep
POM-VPSElanco GmbH
spot-on
Sheep
Crovect 1.25% w/v Pour-on Solution for Sheep
POM-VPSElanco GmbH
spot-on
Sheep
Ectofly 12.5 mg/ml Pour-on Solution for Sheep
POM-VPSBimeda Animal Health Limited
spot-on
Sheep
Fly Off 12.5 mg/ml Pour-on Solution for Sheep
POM-VPSBimeda Animal Health Limited
spot-on
Sheep
MoleEcto 12.5 mg/ml Pour-on for Sheep
POM-VPSElanco Europe Ltd
spot-on
Sheep
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