Pet owners on the Isle of Wight are being urged to be cautious when buying flea and worm treatments online, after a national warning about dangerous counterfeit products.
Authorities have issued the alert following a case in which a cat required emergency surgery after being poisoned by a fake flea treatment bought online.
Toxic chemical found in fake product
The Intellectual Property Office (IPO) and the Veterinary Medicines Directorate (VMD) confirmed that the product in question contained pirimiphos-methyl — a toxic insecticide that is highly dangerous to cats.
Although the incident occurred on the mainland, the warning applies across the UK, including to Isle of Wight residents who may purchase from the same online sellers.
Some of the fake products closely resemble trusted brands like FRONTLINE®, but may contain harmful chemicals or lack any active ingredients.
How to spot a fake
Warning signs include:
- Spelling mistakes or foreign languages on packaging
- Unusual smells, such as white spirit or paraffin
- Packaging that is hard to open
- Prices that appear too good to be true
Dr Heilin-Anne Leonard-Pugh, a veterinary surgeon with the VMD, explained that pirimiphos-methyl can overstimulate a cat’s nervous system.
She said exposure can cause vomiting, tremors, seizures, paralysis, restlessness and, in some cases, death.
“If you suspect your pet has been exposed to a counterfeit medicine, seek veterinary advice immediately.”
Buy from trusted sources
Island pet owners are encouraged to only buy treatments from trusted sellers — ideally their local vet or a reputable retailer — rather than through unknown third-party platforms.
When a product arrives, inspect the packaging carefully. Check for spelling mistakes, unusual smells, or missing information.
Anyone who finds a suspicious product, or believes they may have bought a fake, should report it to Isle of Wight Trading Standards or anonymously to Crimestoppers on 0800 555 111.
Crackdown on illegal sellers
In 2024 alone, the VMD seized more than 18,000 illegal animal medicines and supplements.
One online seller had already distributed over 200 batches of counterfeit treatments before being shut down.
James Potter, Trading Standards and community safety manager at Isle of Wight council, warned of the broader dangers.
He said the appeal of cheaper products can be tempting, but fake goods are poor quality, often untested, and can harm animals.
James also said that buying illegal items helps fund wider criminal activity and damages honest local businesses. He said,
“If you’re aware of counterfeit goods being sold, please report this to Trading Standards.
“We will use our enforcement powers to remove them from the market and pursue further action through the courts if required.”
Reporting poisonings and concerns
If your pet has been affected by a poisoning case, report it using the Veterinary Poisons Information Service (VPIS) questionnaire.
Suspicious medicines or retailers can be reported to the VMD Enforcement Team:
- Email: [email protected]
- Phone: 01932 338338
- Online: Report illegal animal medicines (anonymous option available)
