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Seresto for Large Dogs
The Seresto Large Dog flea and tick collar is made for dogs and puppies 7 weeks of age and older that weigh over 18 lbs. (8 kg). One collar gives up to 8 months of continuous protection against fleas, flea larvae, ticks and chewing lice, with no monthly doses and no greasy liquid. Choose a single collar or save a reorder with the 2-pack.
8 months
per collar
24 hrs
kills fleas
48 hrs
blocks new ticks
7 wks+
minimum age
Single collar or 2-pack?
- Seresto Large Dog collar: one collar, 8 months of protection for one dog.
- Seresto Large Dog 2-Pack: two collars. Protect two dogs of the same size, or keep the second sealed for when the first one’s 8 months are up.
Not sure which size? Seresto dog collars are sized by weight: Small Dog up to 18 lbs., Large Dog over 18 lbs. Shop Seresto for small dogs or read our size guide.
Before you buy
- How to put on a Seresto collar
- How long does Seresto last?
- Can Seresto get wet?
- How to spot a fake Seresto collar
Frequently asked questions
How long does a Seresto Large Dog collar last?
One collar provides up to 8 months of continuous protection. Replace it after 8 months. Dogs that swim once a month or more get 5 months of flea and 7 months of tick protection.
Who is the Seresto Large Dog collar for?
Dogs and puppies 7 weeks of age and older that weigh over 18 lbs. (8 kg).
Does Seresto need a prescription?
No. Seresto is an EPA-registered flea and tick collar sold without a prescription.
Information from the EPA-registered Seresto product labels. This is general product information, not veterinary advice; always read the full label and ask your veterinarian about your pet’s health. Flea Collar Direct is an independent retailer, not affiliated with Elanco. Seresto is a trademark of Elanco or its affiliates.