Stronghold offers a range of prescription spot-on flea treatments for both cats and dogs that treat a number of external and internal parasites for 4 weeks. You can also buy Stronghold Plus for cats for added protection.

Products with this symbol require a vet prescription in the checkout. More information

Showing 11 Product

  1. Stronghold Spot On Medium Dog 120mg (10.1-20kg) 3078
    Stronghold® Spot-On Solution for Medium Dogs 120mg (10.1kg-20kg)
    2 products in range £26.17 £46.96
  2. Stronghold Spot On Small Dog 60mg (5.1-10kg) 3079
    Stronghold® Spot-On Solution for Small Dogs 60mg (5.1kg-10kg)
    2 products in range £24.74 £44.30
  3. Stronghold Spot On 45mg For Cats 3080
    Stronghold® Spot-On Solution for Cats 45mg (2.6kg-7.5kg)
    2 products in range £15.83 £24.35
  4. Stronghold Spot On Toy Dog 30mg (2.6-5kg) 3081
    Stronghold® Spot-On Solution for Toy Dogs 30mg (2.6kg-5kg)
    2 products in range £25.99 £39.36
  5. Stronghold Spot On Large Dog 240mg (20.1-40kg) 3082
    Stronghold® Spot-On Solution for Large Dogs 240mg (20.1kg-40kg)
    2 products in range £34.49 £58.99
  6. Stronghold PLUS Medium Cat 30mg Spot-on Solution For Cats (PLUS) 10483
    Stronghold® PLUS Spot On Solution for Medium Cats 30mg/5mg (2.5kg-5kg)
    2 products in range £18.82 £35.00
  7. Stronghold PLUS Large Cat 60 Mg Spot-on Solution For Cats (PLUS) 10484
    Stronghold® PLUS Spot On Solution for Large Cats 60mg/10mg (5kg-10kg)
    2 products in range £19.20 £38.04

Showing 11 Product

How Does Stronghold Flea Treatment Work?

Stronghold flea treatments offer your pet four weeks' worth of parasite protection in just one treatment.

The active ingredient, Selamectin, kills fleas as well as their eggs and larvae to effectively break the flea life cycle. As well as killing fleas, Stronghold for dogs and cats also treats:

In Dogs:

  • → Roundworms
  • → Sarcoptic mange
  • → Biting lice
  • → Prevention of heartworm disease

In Cats:

  • → Adult roundworms
  • → Adult hookworms
  • → Biting lice
  • → Ear mite infestations

Stronghold also offers Stronghold Plus for cats, which offers even more protection for cats with, or at risk from, mixed parasitic infestations by ticks and fleas, lice, mites, gastrointestinal nematodes or heartworm.

You can buy Stronghold flea treatments online from us in the following dosages.

Stronghold for Cats

Always make sure you choose the correct dosage when buying prescription flea treatments online, and only use Stronghold products on the species and weight specified on the prescription.

How Long Does Stronghold Take to Work on Fleas?

Once applied, Stronghold flea treatments kill all fleas within 24 hours and continue to work and protect your pet from parasites for up to 4 weeks.

Is Stronghold for Fleas and Worms?

Yes! As well as treating flea infestations, Stronghold spot-on solution for cats and dogs also treats some internal parasites, including hookworms and roundworms.

 Can You Buy Stronghold Without a Vet Prescription?

All Stronghold and Stronghold Plus products are prescription-only veterinary medicines, which means they can only be purchased using a valid, in-date prescription from your vet. 

You can learn more about ordering a prescription medicine for your pet from Pet Drugs Online on our prescription information page. For your pet's safety, always be wary of any organisation offering to sell Stronghold or any other prescription-only veterinary medicines without a prescription.

Please note, while we have an onsite vet to oversee the sales of prescription medicines, we do not offer veterinary consultations or advice.