Whilst we remain operational and working really hard to take care of your pet's products as quickly as possible, there may be delays of up to 6 days longer than usual to process your order. Keep safe and stay healthy! You can read more about how we're doing here.
 Free delivery options available over £29*

Stronghold Spot On for Dogs & Cats

Stronghold Spot On for Dogs & Cats Stronghold Spot On for Dogs & Cats Stronghold Spot On for Dogs & Cats
Cat (2.6-7.5kg, blue) » 45mg Pipette (Pack of 3) Cat (2.6-7.5kg, blue) » 45mg Pipette (Pack of 3) Cat (2.6-7.5kg, blue) » 45mg Pipette (Pack of 3)
Cat XL (7.6-10kg, taupe) » 60mg Pipette (Pack of 3) Cat XL (7.6-10kg, taupe) » 60mg Pipette (Pack of 3) Cat XL (7.6-10kg, taupe) » 60mg Pipette (Pack of 3)
Dog XL (40.1-60kg, plum) » 360mg Pipette (Pack of 3) Dog XL (40.1-60kg, plum) » 360mg Pipette (Pack of 3) Dog XL (40.1-60kg, plum) » 360mg Pipette (Pack of 3)

Images are for illustration purposes only. Packaging may change from time to time and images on our website may or may not be updated.

  • Cat (2.6-7.5kg, blue) » 45mg Pipette (Pack of 3) £22.00
  • Cat (2.6-7.5kg, blue) » 45mg Pipette (Pack of 6) £39.49
  • Cat XL (7.6-10kg, taupe) » 60mg Pipette (Pack of 3) £31.00
  • Dog (2.6-5kg, violet) » 30mg Pipette (Pack of 3) £21.49
  • Dog (2.6-5kg, violet) » 30mg Pipette (Pack of 6) £38.50
  • Dog (5.1-10kg, brown) » 60mg Pipette (Pack of 3) £22.00
  • Dog (10.1-20kg, red) » 120mg Pipette (Pack of 3) £25.49
  • Dog (10.1-20kg, red) » 120mg Pipette (Pack of 6) £44.99
  • Dog (20-40kg, green) » 240mg Pipette (Pack of 3) £28.99
  • Dog (20-40kg, green) » 240mg Pipette (Pack of 6) £52.00
  • Dog XL (40.1-60kg, plum) » 360mg Pipette (Pack of 3) £44.99
  • Kittens/Puppies (up to 2.5kg, rose) » 15mg Pipette (Pack of 3) £19.49
  • Kittens/Puppies (up to 2.5kg, rose) » 15mg Pipette (Pack of 15) £85.49

Selection of 13 products from

£19.49 to £85.49


This product is sourced in the United Kingdom and is intended for use in the United Kindgom only.

Stronghold provides one of the most complete parasite treatments available in one easy spot-on application. The contents of one pipette are emptied onto the skin of the back of the neck once a month. The active ingredient is absorbed through the skin and for 1 month it will kill fleas, lice, worms and mites wherever they are, either inside, or on the surface of, the body. In areas where heartworm is found, Stronghold prevents this too, which is important for dogs and cats traveling to Europe on the Pet Travel Scheme.

For a full explanation of the parasite control provided by Stronghold, read the relevant datasheet by clicking on the individual products below.

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:00am - 6:00pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Medication Datasheets

Delivery Information

Reviews (44)

Summary of Reviews for Stronghold Spot On for Dogs & Cats

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
44 out of 44 (100%) customers would recommend this product.
5 stars (40 reviews)
4 stars (4 reviews)
3 stars (0 reviews)
2 stars (0 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

55 Easy to administer
Verified Purchase

By on 25 June 2018

Good value, compared to almost double at the vets.

Customer recommends this product

55 Excellent product
Verified Purchase

By on 23 May 2018

I have been using Stronghold for a couple of years as my dogs seemed to have become immune to their previous well known preventative

Customer recommends this product

55 Stronghold
Verified Purchase

By on 3 May 2018

This seems to be an excellent flea treatment for my two cats, especially the fact that it is waterproof after only two hours.

Customer recommends this product

55 Great
Verified Purchase

By on 13 February 2018

Great product and works

Customer recommends this product

55 Quick, good value service
Verified Purchase

By on 29 November 2017

Works very well.

Customer recommends this product

Page 1 of 9

Next Page

Q & A

Below are some recent questions we've received regarding Stronghold Spot On for Dogs & Cats, including answers from our team.

5 February 2016 at 8:22pm

Stronghold for cats

George my cat

How long does it take before I see no more fleas on George ?

  • VioVet Staff

Good Morning,

Thank you for your question, it takes 2-3 hours to kill the fleas. We do recommend that the house is treated to, to help prevent the cat from getting re-infected as fleas lay the larvae in sofas, blankets and other household items. We also recommend putting all blankets ect. in the washing machine on a boiling wash to kill any larvae and fleas present.

I hope this helps, if you have any further enquiries please do not hesitate to contact us.

27 September 2015 at 4:33pm



is stronghold still effective when they are in the sun bathing everyday?

  • VioVet Staff

It is true that ultra-violet radiation tends to degrade many compounds, but the active ingredient of Stronghold (Selamectin) is absorbed hrough the skin and so is out of reach of the UV. I am sure it will remain effective despite sunbathing.

12 August 2015 at 9:37am

Flea and worm treatment

Jane woodham

I use stronghold on my 8 month old Cocker Spaniel, I have noted that it is effected against some types of worms, do I need to worm my dog every three months with a product like Drontal wormer too ? I am confused as to what worms are killed by what product and if it's necessary for me to purchase both products ? Thanks

  • VioVet Staff

If you use Stronghold then it is unlikely that you need to give any other worm treatment at all. Stronghold is not effective against tapeworms, but they are rare in dogs now apart from a very few areas. If tapeworms are present, they are usually harmless to the dog, but you will see segments of tapeworm. In that case you can use a multi-wormer Drontal, or just Droncit which is purely active against tapeworms. Most people who use Stronghold do not use a separate wormer as well. Obviously your vet can advise you on this as he/she is providing the prescription for it.

10 December 2014 at 9:47am

Can I give another dose?


Stronghold was administered to my cat but not put directly onto the skin. This seems to have made it ineffective 3 days later I am still finding fleas. Can I give an extra dose or will this cause problems?

  • VioVet Staff

The safest thing to do would be to apply a different type of flea
treatment which will not be at all likely to cause a problem with
whatever Stronghold did reach your cat's skin. I would suggest Advantage
or Frontline. They have different active ingredients.
As far as
seeing fleas is concerned, it is quite common at this time of year for
there to be a huge explosion of fleas emerging from eggs (and pupae etc)
which were laid earlier in the year. You can then get lots of new fleas
jumping onto your cat every day, even though many will die after a
while due to the treatment applied. Therefore you might be seeing fleas
even if the Stronghold had been applied perfectly. All these fleas will
eventually die, but you might have to be a bit patient (and ideally
treat the house with something like Indorex).

24 April 2014 at 3:16pm

Pregnant cat

Katherine Turner

Can I use stronghold on my heavily pregnant cat?

  • VioVet Staff

Stronghold is safe to give during pregnancy or lactation. There is a general guide that all medication should be avoided if possible during the first third of pregnancy. It should however be perfectly safe, and a good idea, to use Stronghold in a heavily pregnant cat.

22 April 2014 at 1:48am

Can you use stronghold 45 mg on a dog?

Sophie Cain

Can stronghold 45 mg for cats be used on a dog. If not, why not?

  • VioVet Staff

Licensed medicines are strictly controlled and it is against the law for anyone other than the vet to prescribe Stronghold. If the prescribing vet considers using a medicine in some way differently from its legal authorisation, then he can do so and it is up to him to justify his decision afterwards if something goes wrong. Having said that, I expect that most vets would consider it perfectly OK to use the Cat Stronghold on a dog if it was of suitable weight, age etc.

10 August 2013 at 4:23pm

Flea treatment in dogs

m west

How soon after application will the irritation stop.

  • VioVet Staff

This normally takes a few days. However it depends on how many fleas are present in the environment, how sensitised the dog has become to flea saliva(injected when they bite), and whether or not the irritation is caused or complicated by other things. All fleas on the dog should die, but more will jump on for a while. They too will die, but if there are lots living in the environment, it will take a while for them all to die. For this reason, it is often recommended to use a household flea spray for carpets and bedding etc as well. All fleas will go in time without, but it takes longer. Sometimes the dog's skin can have a mild, secondary bacterial infection which prolongs irritation. This can be treated as well if needs be, but you vet will have checked for this. If the irritation is persisting longer than you think is reasonable, it is best to return to your vet for advice. There will be a reason, though it is very unlikely to be the Stronghold not killing fleas, as it is generally found to be extremely effective.