The UK tapeworm rule for dogs: the 24–120 hour window

The rule

• A vet must give the treatment no less than 24 hours and no more than 5 days (120 hours) before you enter Great Britain.
• The product must contain praziquantel (or an equivalent proven effective against Echinococcus multilocularis) and be approved in the country where it is given.
• The vet records the product name and manufacturer, the date and time of treatment, and their stamp and signature on your dog's certificate.
• It applies every time you bring your dog to Great Britain.

Who doesn't need it

Dogs coming directly to Great Britain from Finland, Ireland, Northern Ireland, Malta or Norway. Cats don't need tapeworm treatment.

How to time it

• Book the vet visit 2–3 days before your flight. Even with a long flight you land well inside the window.
• Delayed by more than 5 days after the treatment? Your dog may need a new one.
• Live in Great Britain and coming home? GOV.UK advises treating your dog again within 28 days of returning.

The other UK surprise: hold only

Pets can't fly in the cabin on flights into Great Britain — only recognised assistance dogs can. Everyone else travels in the hold on an approved airline and route, so check the GOV.UK list of approved routes before you book.

Official sources: www.gov.uk · www.gov.uk · www.gov.uk. Not legal or veterinary advice — confirm with your vet, your airline and the official authority.

More guides

• Flying with a short-nosed dog or cat: which airlines say no
• The new EU pet health certificate from October 1, 2026
• Your UK pet passport no longer gets your pet into the EU