How Flea and Tick Chews Work in Your Pet's Body

Understanding Flea and Tick Chews

Flea and tick chews are oral medications designed to kill and repel these pests. They are typically flavored to make them appealing to pets, ensuring easy administration. The active ingredients in these chews are absorbed into your pet’s bloodstream and work systemically to provide comprehensive protection.

The Active Ingredients

The most common active ingredients in flea and tick chews include:

  1. Afoxolaner: Used in products like NexGard, it interferes with the nervous system of fleas and ticks, causing paralysis and death.
  2. Fluralaner: Found in Bravecto, it works similarly to afoxolaner but provides longer-lasting protection, often up to three months.
  3. Sarolaner: Used in Simparica, it also targets the nervous system of fleas and ticks, ensuring quick elimination.

These ingredients belong to a class of chemicals known as isoxazolines, which are highly effective in targeting parasites while being safe for pets when used as directed.

How Flea and Tick Chews Work

When your pet consumes a flea and tick chew, the active ingredient is absorbed through the digestive system and enters the bloodstream. Here’s a step-by-step breakdown of the process:

  1. Ingestion and Absorption: After your pet eats the chew, the active ingredient is absorbed into the bloodstream through the walls of the intestines.
  2. Distribution: The ingredient circulates throughout the pet’s body, reaching the skin and fur.
  3. Action on Parasites: When a flea or tick bites your pet, it ingests the blood containing the active ingredient. The isoxazoline compounds interfere with the nervous system of the parasites, leading to hyperexcitation, paralysis, and death.
  4. Ongoing Protection: The active ingredient remains effective in your pet’s bloodstream for a specified period, typically ranging from one to three months, providing ongoing protection against new infestations.

Benefits of Flea and Tick Chews

  1. Convenience: Oral chews are easy to administer, especially for pets that resist topical treatments or collars.
  2. Comprehensive Protection: Because the active ingredient is distributed throughout the bloodstream, it provides full-body protection against fleas and ticks.
  3. Long-Lasting: Many chews offer extended protection, reducing the frequency of treatments.
  4. Multi-Parasite Protection: Some chews also protect against other parasites, such as mites and worms, offering broader health benefits.

Safety and Side Effects

Flea and tick chews are generally safe when used as directed. However, as with any medication, there can be side effects. Common side effects may include:

  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Lethargy

If your pet experiences any severe reactions or if you have concerns about side effects, consult your veterinarian promptly.


Flea and tick chews provide a reliable and convenient solution to protect your pets from harmful parasites. By understanding how these chews work within your pet’s body, you can appreciate the science behind their effectiveness and ensure your furry friends stay healthy and happy. Always consult with your veterinarian to choose the best flea and tick prevention method for your pet and to ensure safe and effective use.

Keep your pets safe from fleas and ticks with Beloved Pets' flea and tick chews – a tasty treat for a healthy, pest-free life! 🐾🦟🌟

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