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Permethrin
Pyrethroid (type I) insecticide and acaricide. Registered in Georgia: 30 veterinary products. Forms: aerosol / spray, ear drops, solution, spot-on, topical (unspecified).
Toxic doses
Single acute ingestion, mg of the substance per kg of body weight. These are toxic doses, not treatment doses.
| Species | Signs begin | Severe | Deaths reported | Source |
|---|---|---|---|---|
|
Cat
also gels and creams licked off |
not established | not established | not established |
VMD SPC 2026 · Boland & Angles 2010 +1
High confidence
The products' labels say they are extremely poisonous to cats; two case series (42 cats in Australia, 61 in Israel) describe the signs and found that most cases were dog spot-ons applied to cats. Official product label (SPC), VMD, UK Approved by the UK Veterinary Medicines Directorate (VMD) as part of the product's authorisation. It applies to that product as authorised there. UK Veterinary Medicines Directorate, VMD SPC_110672 Advantix 40+200 08/2026, 2026 label: do not use on cats, extremely poisonous, keep treated dogs away until dry Scientific article A study or review published in a scientific journal. Its findings apply to the animals and conditions it studied. Journal of Feline Medicine and Surgery, J Feline Med Surg 2010;12(2):61-71, 2010 42 cats: tremors 86%, seizures 33%, mostly dog spot-ons Scientific article A study or review published in a scientific journal. Its findings apply to the animals and conditions it studied. Israel Journal of Veterinary Medicine, Isr J Vet Med 2020;75(3):142-147, 2020 61 cats: 89% dog spot-on applied by the owner; good outcome with intensive treatment |
Cat
Signs: Tremors and muscle twitching (the most common sign), twitching of the ears and skin, hypersensitivity to touch, seizures, unsteadiness, dilated pupils, drooling, high or low body temperature.
Dog products containing permethrin must never be used on cats. Almost every poisoning is a concentrated dog spot-on (40-65% permethrin) put on a cat by mistake; close contact with a recently treated dog can also be enough. If it happens: wash the cat with a mild shampoo and get it treated at once; with intensive treatment most cats recover. No safe skin dose for cats is established.
Doses
Each dose comes with its source. Check the label of the product you use.
| Dose | Species | Indication | Route | Frequency | Source |
|---|---|---|---|---|---|
| 50 mg/kg | Dog | Maintenance | On the skin | according to the epidemiological situation |
VMD SPC 2026
Official product label (SPC), VMD, UK Approved by the UK Veterinary Medicines Directorate (VMD) as part of the product's authorisation. It applies to that product as authorised there. UK Veterinary Medicines Directorate, 2026 |
| 60 mg/kg | Dog | Maintenance | On the skin | not more often than once every 4 weeks |
VMD SPC 2025
Official product label (SPC), VMD, UK Approved by the UK Veterinary Medicines Directorate (VMD) as part of the product's authorisation. It applies to that product as authorised there. UK Veterinary Medicines Directorate, 2025 |
Safety information
Known Contraindications
-
Critical
Do not use in cases of hypersensitivity to the active substances, or to any of the excipients.Sources: VMD SPC · VMD
-
Critical
(Cat) Do not use on cats. This veterinary medicinal product is extremely poisonous to cats and could be fatal due to the unique physiology of cats which is unable to metabolise certain compounds including permethrin. To prevent cats from being accidentally exposed to the veterinary medicinal product, keep treated dogs away from cats after treatment until the application site is dry. It is important to ensure that cats do not groom the site of application on a dog, which has been treated with this veterinary medicinal product. Seek veterinary advice immediately if this occurs. Do not use on rabbits and cats as adverse reactions and even death can occur In case of accidental dermal exposure, wash the cat with shampoo or soap, and seek veterinary advice rapidly.Sources: VMD SPC · VMD
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Warning
(Dog) In the absence of available data the veterinary medicinal product should not be used on puppies of less than 7 weeks of age or 1.5 kg of weight. The safety of the product has not been established in dogs younger than 12 weeks of age or in dogs weighing less than 1.5 kg.Sources: VMD SPC · VMD
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Caution
(Dog) Can be used during pregnancy and lactation. The safety of the veterinary medicinal product has not been established in dogs during pregnancy, lactation or in animals intended for breeding. Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone have shown evidence of foetotoxic effects. Use only according to the benefit-risk assessment by the responsible veterinarian. The safety of the veterinary medicinal product has not been established during pregnancy and lactation in bitches. Use in pregnancy and lactation only in accordance with professional veterinary advice and a benefit/risk assessment.Sources: VMD SPC · VMD
-
Caution
(Dog) Can be used during pregnancy and lactation. Use only according to the benefit-risk assessment by the responsible veterinarian.Sources: VMD SPC · VMD
All forms and registration30
Registration in Georgia and abroad: the register, number, validity and source are behind (i).
Advantix 100 mg + 500 mg, Spot-on
Advantix 250 mg + 1250 mg, Spot-on
Advantix 400 mg + 2000 mg, Spot-on
Advantix 600 mg + 3000 mg, Spot-on
Anandin Plus 0.5/20 mg/ml ear drops, Ear drops
Arpalit Neo 4.8/1.2 mg/g cutaneous foam, Topical (unspecified)
Ataxxa 200 mg/40 mg, Spot-on
Ataxxa 500 mg/100 mg, Spot-on
Ataxxa 1250 mg/250 mg, Spot-on
Ataxxa 2000 mg/400 mg, Spot-on
Chistotel Maximum 47.5/9.5 mg/ml, Spot-on
Chistotel Maximum 0.4 %, Solution
DIXIE Permethrin, Spot-on
DIXIE Permethrin, Spot-on
Effitix 26.8 mg/240 mg, Spot-on
Effitix 67 mg/600 mg, Spot-on
Effitix 134 mg/1200 mg, Spot-on
Effitix 268 mg/2400 mg, Spot-on
Effitix 402 mg/3600 mg, Spot-on
Lapushka 0.4 %, Solution
Permethrin Pharma 1% shampoo, Topical (unspecified)
PERMETHRIN spot-on, Spot-on
Phytoelita 0.3 %, Solution
Top Spot On Stronger 650 mg/ml, Spot-on
WOW!, Spot-on
WOW!, Spot-on
WOW!, Spot-on
Professional reference for veterinary professionals. Not advertising and not a substitute for the product label/SPC.
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