Capstar Flea Tablets for Dogs & Cats

Capstar Flea Tablets for Dogs & Cats
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Cats & Dogs Up To 11kg » 11.4mg (6 Tablets)
Dogs Over 11kg » 57mg (6 Tablets)

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  • Cats & Dogs Up To 11kg » 11.4mg (6 Tablets) £20.79
  • Dogs Over 11kg » 57mg (6 Tablets) £22.88

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Description

Capstar tablets are given to dogs and cats to kill any adult fleas present. After taking a tablet, fleas will start to die after just 15 minutes. All adult fleas present should be dead within 24 hours. Capstar is very safe for pets, but lethal for fleas. However it is important to remember that more fleas will tend to jump onto your pets as they move around the house and outdoors. Therefore it is always best to use some other form of flea control as well. An insecticidal spray used in the house is very effective, such as Indorex or Acclaim. Something to prevent fleas breeding can be given to your dog and cat too, such as Program. This is available without prescription and if used every month will prevent flea eggs from developing.
It is safe to give repeated doses of Capstar tablets if more fleas are seen, but no more than one dose per day should be given.

CAPSTAR does not have persistent activity. To prevent re-infestation, a suitable treatment to control immature stages of the flea life cycle is recommended. The veterinary surgeon should establish an appropriate treatment regime.

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Medication Datasheets

Reviews (49)

Summary of Reviews for Capstar Flea Tablets for Dogs & Cats

Overall 4
Effectiveness
Ease Of Use
Value For Money
Absence Of Side Effects
44 out of 49 (90%) customers would recommend this product.
5 stars (22 reviews)
4 stars (19 reviews)
3 stars (3 reviews)
2 stars (2 reviews)
1 stars (3 reviews)

Only verified purchasers of this product can leave a review.

Does exactly as it says on the packet
Verified Purchase

By Angela Johnson on 19 February 2026

Definately kills any fleas. Just a pity it's so short term...but it does exactly what it says

Customer recommends this product

Flea drop smells freak him out. Tablets much better for him.
Verified Purchase

By D.F. Watt on 30 January 2026

Easier for my cat as he hates smelly stuff and the smell from flea drops freak him out for days.

Customer recommends this product

My dog won’t have the liquid put on him
Verified Purchase

By Lynn Morris on 22 December 2025

I can hide these little tablets in his food

Customer recommends this product

Effective product
Verified Purchase

By Norma Laity on 15 September 2025

Really good flea killer easy to use without any side effects

Customer recommends this product

3 felines
Verified Purchase

By Sally Vidler on 9 August 2025

Always buy Capstar they're very good, my indoor cats never had fleas so I give them 1 every 6 to 8 weeks.They work well,also I use indorex for the house.

Customer recommends this product

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Q & A

Below are some recent questions we've received regarding Capstar Flea Tablets for Dogs & Cats, including answers from our team.

25 June 2025 at 9:41am

Edwin Blake

  • VioVet customer since 2012
  • From: antrim, United Kingdom

Are there any side effects

  • VioVet Staff

In very rare cases in cats, this may present as transient signs of hyperactivity, vomiting, panting, vocalization and excessive grooming.

18 June 2025 at 5:07pm

Dossage

Janet Stannard

  • VioVet customer since 2023
  • From: Kent, United Kingdom

Is that a monthly pill

  • VioVet Staff

A single dose of Capstar should kill the adult fleas on your pet. If your pet gets re-infested with fleas, you can safely give another dose of Capstar as often as once per day.

Only suitable for dogs of 2 lbs and greater.

14 January 2025 at 1:19pm

Dosage for large dog

Lesley

Is this flea treatment suitable for 34ish kilo male dog. I am using advantage at the moment and am not sure how effective it is. Or can you recommend another treatment without prescription please. Thank you Lesley

  • VioVet Staff

One Capstar 57mg tablet should be given to dogs weighing 11.1kg to 57.0kg and two tablets for dogs weighing over 57 kg when a flea infestation is detected. The frequency of treatment depends on the degree of infestation.

25 June 2022 at 10:49am

Is this prescription only

Angie

Do you need a vet prescription to buy this?

  • VioVet Staff

This medication is AVM-GSL classified, this means you do not need a prescription to purchase it. It can be bought with us over the counter.

1 January 2022 at 7:01am

Flea treatment

Rhiannon Griffiths

Can you use both frontline plus and capstar at the same time on a dog?

  • VioVet Staff

Yes, you can use both Frontline Plus and Capstar safely together. If you would like advice on how to protect against fleas or treat an infestation please contact us on [email protected].

17 April 2018 at 8:46pm

Feeding bitches

Angela Pett

  • VioVet customer since 2014
  • From: Kent, United Kingdom

Is this safe to use on lactating mums

  • VioVet Staff

Yes, Capstar can be given at all stages of pregnancy or lactation.

25 January 2018 at 4:01pm

How often do we administer tablets

Wendy

How often do I need to give each tablet

  • VioVet Staff

Hello.

Thank you for your question.

Administer these tablets on any day when fleas are seen on the animal. No more than one treatment should be given per day. These tablets are used for an existing flea infection. If you are wanting something for prevention, any spot on treatments would be suitable such as Frontline, Effipro and Advantage. Ensure you have your household flea spray too and we can recommend Indorex or Acclaim. 90% of fleas live in the environment and not on your pet so a spray for the environment is most important.

I hope this helps!

9 July 2017 at 10:10pm

Dosage for 12 week old kittens

Donna

  • VioVet customer since 2013
  • From: Lincolnshire, United Kingdom

Would half a tablet be sufficient for 12 week old kittens that weigh 1kg and just over or do they need a whole tablet when they are so small?

  • VioVet Staff

Hi Donna,

Here is the dosage information.

Weight of cat or dog Dose
1 11kg 1 tablet CAPSTAR 11.4mg
11.1 57kg 1 tablet CAPSTAR 57mg
Over 57kg 2 tablets CAPSTAR 57mg

For a 1kg cat you would need to give 1 whole tablet.

I hope this helps.

6 October 2014 at 2:13pm

Capstar and fiprospot

Helle Reiche Knudsen

Can I use capstar with Fiprospot ?

  • VioVet Staff

Yes, Capstar should be perfectly safe to use
with Fiprospot. They contain different active ingredients which should
not have any interactions, and none are advised in the data sheet-
Capstar has been tested against many common pet products with no side
effects. Capstar tablets have very short term effects but should not be
used more than once per day.
It is highly recommended that you
treat the house and all pet bedding to get rid of the eggs and larvae
that will be in your pets environment. The females lay thousands of eggs
each day, so when they hatch, it can appear that your products are not
working, when really they have but the fleas are being replaced with new
ones! I would personally choose to use either Genitrix RIP Fleas Spray or Virbac Indorex Spray

16 December 2013 at 11:31am

Capstar with Advocate

Laura Brown

Is it safe to use both Capstar and Advocate at the same time, with a heavy flea infestation.

  • VioVet Staff

Yes it should be perfectly safe to use these two products together
because they work in completely different ways and contain completely
different ingredients, with no known interactions to my knowledge.

I would say that theoretically you should not need to use them
together, because Advocate should deal with fleas on its own. However if
there is a heavy burden to get rid of, the Capstar should provide a
dramatic immediate effect. The general environmental population in the
background might act as a reservoir for a while, so an environmental
flea spray such as Indorex could be considered.

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