Capstar for Dogs and Cats Review

Est. $30 for six doses
March 2015
by ConsumerSearch
Capstar for Dogs and Cats Review

Best flea medication

  • Kills adult fleas quickly
  • Side effects are rare
  • No mess
  • No prescription required
  • Doesn't kill flea eggs or larvae
  • Pets may not take pill willingly
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Bottom line

Capstar for Dogs and Cats is an over-the-counter tablet that's very safe for both dogs and cats as young as four weeks. Dogs that weigh more than 25 pounds can use a separate formulation, Capstar for Dogs (Est. $25 for six doses). Capstar kills fleas quickly and without the mess of topical treatments, but it works only on adult fleas. That means you'll probably need to administer repeated doses of Capstar to wipe out an infestation. The pill is safe enough to be given again as soon as the next day.

Breaking it down


Kills adult fleas only. Most reviewers, including vets and pet owners, say Capstar for Dogs and Cats works amazingly fast. Many users say they could literally see fleas dropping off their pets in an hour or less. However, others complain that it had no effect on their pets or that it wore off very quickly. Some of these owners may not have realized that Capstar kills only adult fleas and won't stop new ones from appearing. Some owners say they can keep fleas at bay just by repeating the dose of Capstar every week or so, but others use Capstar for immediate relief and a topical treatment for long-term control.


Safe for pets and humans. All reviewers agree that Capstar poses virtually no risk to humans. Side effects in pets are also less common, and less severe, than with topical treatments. One vet, reviewing the product at, says, "I have rarely seen any side effects in my clinical experience in using this product" and notes that it's safe even for pregnant or nursing pets. A few owners note that pets (especially cats) may become hyperactive as the medicine takes effect, possibly because the fleas bite more as they die. Very rare side effects include lethargy, trembling and allergic reactions.

Ease of use

Can be tricky to administer. Some pet owners like the fact that this tablet doesn't create any mess like topical treatments do. Most users report no problems getting their pets to take Capstar, but a few say that some pets, especially cats, are reluctant to swallow it. Some owners say the easiest method is to put the pill in the pet's food or hide it in a treat such as cheese or peanut butter.

Capstar for Dogs over 25 lbs 6 tablets GREEN
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Where To Buy
Novartis Capstar Flea Tablets for Dogs and Cats, 6 Count, 2-25 lbs, Blue

 (3,450 reviews)
Buy new: $32.99 $24.99   33 New from $24.00

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Capstar for Dogs and Cats Reviews


More than 600 pet owners review Capstar for Dogs and Cats at this online pet pharmacy. Users give Capstar a rating of 4.2 stars out of 5 overall, with 4.2 stars for effectiveness and 4.5 for ease of use. Most owners say it works fast, with no adverse effects. Some note that re-infestations can occur; some deal with that by giving Capstar every one to two weeks, others by using Capstar to get rid of fleas immediately, and a monthly treatment such as Frontline for long term relief.

Review: Capstar Flea Treatment Tablets, Contributors to, As of March 2015


We found roughly 1,250 user reviews here for Capstar. Pet owners generally find this product safe and effective, giving it an overall rating of 4.1 stars. The most common complaint is that it kills adult fleas only and can't treat an infestation on its own.

Review: Capstar Flea Treatment Dog (Blue), 2-25 lbs, 6 tablets, Contributors to, As of March 2015

3. All Feline Hospital

Vets at All Feline Hospital in Lincoln, Neb., say Capstar for Dogs and Cats kills adult fleas within 30 minutes, making it great for fast relief in cats with flea allergies. However, it must be combined with topical treatments to completely eliminate fleas from the home.

Review: Flea Eradication, Staff of All Feline Hospital, Not Dated


There are about 130 reviews for Capstar for Cats and Dogs at, most of them positive. The product earns 4.6 stars out of 5 overall, and 93 percent of users recommend it. Most users say Capstar is safe, effective and fast-working.

Review: Capstar Flea Tablets for Pets, Contributors to, As of March 2015

5. VeterinaryPartner

In this article, veterinarian Carol S. Foil says Capstar for Dogs and Cats is safe and "offers extremely rapid and complete killing of adult fleas." However, she notes that it must be combined with another product for long-term flea control.

Review: Flea Control, Carol S. Foil, Not Dated

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