Capstar Oral Flea Treatment for Cats Review

PawperCare Team

Updated on:

Capstar is an oral flea treatment for cats that kills adult fleas quickly and safely. It is a tablet that contains nitenpyram, a neonicotinoid insecticide that paralyzes and kills fleas within 30 minutes. Capstar can be given once a day to provide fast relief from flea bites and prevent further infestation.

Overall Score

Easy to use: 4.2

Rating: 4.5 out of 5.

Comfort: 4

Rating: 4 out of 5.

Effectiveness: 4.8

Rating: 4.5 out of 5.

Safety: 4

Rating: 4 out of 5.

Our Verdict

Capstar is a great option if you are looking for a fast and effective way to get rid of fleas on your cat. According to many customer reviews, it can start to kill fleas in 30 minutes. Even one tablet can kill almost 90% of the adult fleas on your cat. However, some cats may show signs of discomfort. Overall, it is a powerful way to get rid of cat fleas.

Product Details

TypesOral Treatment Tablet
Age RangeAll life stages
For Cats2 pounds of body weight or greater and 4 weeks of age or older
Approved By FDAYES

Key Features

  • Rapid action: Begins killing fleas within 30 minutes.
  • Quick relief: Provides fast relief from flea infestations.
  • Minimum age and weight: Safe for pets as young as four weeks old and weighing at least 2 pounds.
  • Oral administration: Administered through an oral tablet.

Customer Feedbacks

100 Effective” This customer told us how they used Capstar oral flea treatment for their two young and old cats and how it was effective, fast, and safe. They also shared their challenges of giving the pill to their cats, and how they combined it with other methods to eliminate the fleas. They expressed their satisfaction and relief with the product and its results.

the best so far” This customer think CAPSTAR was a game-changer for the customer’s flea problem. After trying everything, the tiny pill worked wonders. It was easily disguised in wet food, and using it twice a month for two months provided relief. Despite being a bit expensive, it was worth it compared to ineffective alternatives. Highly recommended.

Cat seem uncomfortable” This customer gave their cat multiple doses of the medication and noticed that each time, her cat appeared uncomfortable, with hot paws and signs of pain. After three doses, this customer stopped using the medication because it didn’t effectively eliminate the fleas and they didn’t want their cat to experience any more discomfort.

How Does Capstar Work?

Capstar contains the active ingredient nitenpyram, a chemical insecticide that targets the nervous system of fleas. Nitenpyram works by blocking the neural signaling of the central nervous system of insects, causing paralysis and death. When your cat ingests the Capstar tablet, it quickly reaches peak levels in the bloodstream.

As fleas bite your cat, they ingest the nitenpyram, disrupting their nervous system and subsequent death. It’s important to note that Capstar has a short duration of action (24 hours), making it effective for quick relief from flea infestations but requiring additional treatments for long-term control.

How to Feed Your Cat Capstar?

  1. Check Weight and Age: Ensure your cat meets the minimum weight and age requirements for Capstar.
  2. Prepare Wet Food: Take a small amount of your cat’s favorite wet food. Ensure it’s a quantity that your cat will consume entirely.
  3. Crush or Break Tablet: If the Capstar tablet is small and can be easily crushed, you can crush it and mix it thoroughly with the wet food. Alternatively, you can break it into smaller pieces.
  4. Mix Thoroughly: Mix the crushed or broken Capstar tablet with the wet food until it’s well combined.
  5. Present the Mixture: Place the Capstar-infused wet food in your cat’s feeding bowl.
  6. Observe Consumption: Allow your cat to eat the food containing Capstar. Ensure your cat consumes the entire portion.
  7. Monitor for a Few Minutes: Keep an eye on your cat for a few minutes to ensure it doesn’t leave any portion of the food, including the Capstar.

Remember to provide fresh water for your cat to drink. If you have any concerns or your cat experiences adverse reactions, contact your veterinarian immediately.


How long will Capstar last?

Capstar provides effectiveness for approximately 24 hours. This brief duration is intentional, aiming to eliminate fleas on your cat quickly. It’s a short-term solution for flea control.

Additional and longer-acting flea control measures are recommended for extended protection, especially in preventing future infestations. Veterinarians may suggest combining Capstar with other flea prevention products for a comprehensive approach to managing fleas on your pet.

Does Capstar kill fleas or just make them jump off?

Capstar actively kills fleas rather than making them jump off. The active ingredient, nitenpyram, interferes with the fleas’ nervous system, causing rapid paralysis and subsequent death.

As your cat ingests Capstar, the medication circulates in its bloodstream, and when fleas bite, they eat the lethal dose. This targeted action ensures the effective elimination of fleas on your cat.

Unlike some treatments that may cause fleas to move but not necessarily die, Capstar’s primary function is to swiftly and definitively eliminate the fleas present on your pet within a short timeframe.

What are the side effects of Capstar?

Capstar is generally considered safe, but like any medication, it may cause side effects in some cats. Commonly reported side effects include mild and temporary reactions such as lethargy, hyperactivity, itching, and mild digestive issues. These symptoms typically resolve on their own within a short period.

Serious side effects are rare but can include more pronounced behavioral changes or allergic reactions. If your cat experiences severe or persistent side effects, it’s crucial to contact your veterinarian promptly.

Always follow the recommended dosage based on your cat’s weight, and avoid giving multiple doses quickly without veterinary guidance. While most pets tolerate Capstar well, individual reactions can vary.

How long does Capstar kill fleas?

Capstar provides a rapid and short-duration solution for flea control. It starts killing fleas within 30 minutes of administration and remains effective for approximately 24 hours.

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