Capstar Flea Tablets for Dogs & Cats

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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.


Filter the products displayed:
  • Product Price QTY  
  • Cats & Dogs Up To 11kg » 11.4mg (6 Tablets)
    Estimated dispatch within 24 working hours.
    TVP: £27.24 Our price: £12.47 Buy
  • Dogs Over 11kg » 57mg (6 Tablets)
    Estimated dispatch within 24 working hours.
    TVP: £28.63 Our price: £13.17 Buy

Below is the product datasheet. This has been provided by the manufacturer and should always be provided with the medication.


Company name: Novartis Animal Health UK Ltd
Address: Frimley Business Park
GU16 7SR
Telephone: 01276 694402
Fax: 01276 694403


White to light yellow, round, biconvex tablets, with bevelled edges.
Capstar 11.4mg tablets:11.4mg nitenpyram imprinted on one side with ''RB'', on the other side with ''CG''.
Capstar 57mg tablets: 57mg nitenpyram imprinted on one side with ''HIH'', on the other side with CG''.


Capstar is indicated for the treatment of fleas on dogs and cats.

Dosage and administration

Capstar tablets are administered orally at a minimum recommended dose of 1mg/kg, with the following recommendations:

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

Capstar tablets should be given orally, either directly into the mouth or mixed into a small portion of food and given immediately. Administer on any day when fleas are seen on the animal. No more than one treatment should be given per day.


Special precautions for use
Do not use on animals less than 4 weeks old or weighing less than 1kg.
Undesirable effects
For the first hour after administration, the pet may scratch more than normal. This effect is caused by the fleas reacting to the product.

Pharmaceutical precautions

Keep out of reach and sight of children.
Do not store above 25C.
Do not use the tablets after their expiry date.

Legal category


Packaging Quantities

Aluminium blister containing 6 tablets. Cardboard box containing 1 blister.

Further information

Effects on fleas may be seen as soon as 15 minutes after administration. Between 95% and 100% efficacy is observed within the first 6 hours and 100% efficacy is reached within 24 hours.
To help prevent re-infestation, the additional use of a suitable treatment to control immature stages of the flea life cycle in the environment is recommended. If in doubt consult your veterinary surgeon.
Nitenpyram is neither embryotoxic nor teratogenic. It can be given to animals at all stages of pregnancy or lactation.
No adverse drug reactions were seen when nitenpyram was administered with other products commonly used in small animal veterinary practice including commonly used flea products, vaccines or antibiotics.
Overdose: nitenpyram is well tolerated. Overdosage up to 70mg/kg was asymptomatic.

Marketing authorisation numbers

Capstar 11.4 mg Vm 12501/4059
Capstar 57 mg Vm 12501/4060

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All prices include VAT where applicable.

Summary of Customer Ratings & Reviews for Capstar Flea Tablets for Dogs & Cats

Overall Rating:
3 out of 5
  • Effectiveness
    2.5 out of 5
  • Ease Of Use
    5 out of 5
  • Value For Money
    2.5 out of 5
  • Absence Of Side Effects
    5 out of 5

1 out of 2 (50%) customers would recommend this product.

5 stars
0 reviews
4 stars
1 reviews
3 stars
0 reviews
2 stars
1 reviews
1 star
0 reviews

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4 out of 5

Good for instant relief

20th November 2013
  • VioVet Customer Since: September 2012
  • From: Kent, United Kingdom

Having 2 cats and a dog, the cats will bring in fleas and the dog suffers. While waiting for the flea spray cycle to work these tablets are great for bringing instant relief from any bites. It only kills fleas if they actually bite and only any good while being used in conjunction with flea sprays. Great if your pet has to go into kennels/cattery, one of these before they come back in the house and fleas don't come with them!

  • Effectiveness
    4 out of 5
  • Ease Of Use
    5 out of 5
  • Value For Money
    4 out of 5
  • Absence Of Side Effects
    5 out of 5
Sarah Gordon would recommend this to a friend!
Number of people who found this review helpful:
2 out of 5

doesn't work

13th August 2013
  • VioVet Customer Since: July 2013
  • From: Bedfordshire, United Kingdom

Iv used capstar on both my labradors and my cat. and have found that they only work for a few day and the fleas come back, despite using the index household flea spray.

  • Effectiveness
    1 out of 5
  • Ease Of Use
    5 out of 5
  • Value For Money
    1 out of 5
  • Absence Of Side Effects
    5 out of 5
Number of people who found this review helpful:

Ask your own question about Capstar Flea Tablets for Dogs & Cats

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Questions & Answers for Capstar Flea Tablets for Dogs & Cats

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

Capstar with Advocate 16th Dec 2013

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

  • Website Content Developer at VioVet

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.

Answer written by John Cousins BVSc MRCVS