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Product Description

Ultimate Guide to Interceptor

Meet the Dangerous Parasite Protector: Interceptor!

Interceptor is an FDA-approved dog and cat medication that protects your dogs from four dangerous (and potentially fatal) internal parasites: heartworms, roundworms, whipworms, and hookworms. Interceptor is a monthly, oral tablet that ensures that your dog or cat is safe, happy, and healthy.

How does the medication Interceptor work?

Interceptor is a medication with one powerful active ingredient Milbemycin Oxime, which is the brand Interceptor 's generic name.

Milbemycin Oxime is a strong parasiticide and a 100% effective heartworm disease preventative against D.immitis (i.e., heartworm larvae). Additionally, Milbemycin Oxime controls the other three dangerous intestinal worms that are found in dogs (i.e., adult roundworms, hookworms, and whipworms).

Milbemycin Oxime is part of the avermectin category of drugs and pesticides that intercepts the major neurotransmitter in the nervous systems of all vertebrates. Certain receptors are targeted during its deworming that then causes parasite paralysis and eventually death of nematodes (i.e., roundworms) and arthropods (e.g., insects).

How is Interceptor administered?

Interceptor is administered orally once a month and protects a dog for the next 30 days. These artificial beef-flavored tablets are easily taken and consumed by 95% of dogs. See the monthly dosage chart below that depends on your dog or cat 's body weight:

Body Weight of Dog (D) or Cat (C)

Monthly Dosage of Milbemycin Oxime (mg)

No. of Tablets

D 2 - 10 lbs.

2.3 (Brown)


D 11 - 25 lbs.

5.75 (Green)


D 26 - 50 lbs. C 6.1 - 12 lbs.

11.5 (Yellow)


D 51 - 100 lbs. C 12 - 25 lbs.

23.0 (White)


D 100+ lbs. C 25+ lbs.

Give a combination of tabs, based on weight

What are the potential side effects of which you should be aware?

Test for heartworm disease before using Interceptor.In a small percentage of milbemycin-treated dogs, digestive and neurologic side effects may occur. Interceptor 's rare unfavorable reported reactions are vomiting, diarrhea, depression, lethargy, hypersalivation, seizures, weakness, and decreased appetite.

Frequently Asked Questions
  1. Does Interceptor work differently for cats versus dogs?

    For dogs, Interceptor treats heartworm disease and hookworms, and removes and controls whipworms and roundworms. For cats, Interceptor is the only monthly, oral medication that guards against heartworms and eradicates adult roundworms and adult hookworms.

  2. What is Interceptor?

    Interceptor is a prescription drug that comes as a monthly, oral tablet that protects dogs and cats from four dangerous (and potentially fatal) internal parasites. Interceptor prevents heartworm disease, controls adult hookworms, and removes roundworms and whipworms. Interceptor only affects internal, not external, parasites.

  3. What is the difference between Interceptor, Interceptor Plus, and Interceptor Spectrum?

    Interceptor Plus (U.S.) and Spectrum (Australia) also have the active ingredient praziquantel, an anthelmintic natural substance that kills trematodes (i.e., tapeworms) and cestodes (i.e., flukes). Praziquantel is an insect growth regulator (IGR) that inhibits flea larvae from hatching or growing into an adult flea.

  4. What are Interceptors ' flavors?

    Interceptor is a beef-flavored vitamin-like tablet, not chewable. You can give the tablet by hand, hide it in something like cheese, or crush it into the pet 's food. Interceptor Plus and Interceptor Spectrum are a chicken-flavored chewable.

  5. How long does it take for Interceptor to work?

    This medication should take effect within one to two days to create a layer of protection against internal parasites. If you see intestinal parasites or worms in your pet 's stool, it means that the medication is working, because it is clearing out the pet 's gastrointestinal system.

  6. What is the Interceptor dosage for small, medium, and large dogs & cats?

    Before purchasing Interceptor, make sure that you test your pet for heartworm disease before deworming therapy and before using Interceptor.Interceptor has five different options (and boxes) of milbemycin oxime dosages (mg) based on your cat or dog 's body weight. See the monthly dosage chart above.

  7. Is Interceptor for puppies and kittens?

    Interceptor can be given to puppies that are at least 4 weeks of age and weighing 2 lbs. Interceptor can be given to kittens that are at least 6 weeks of age and weighing 1.5 lbs.

  8. What do the Interceptor reviews say?

    Interceptor reviews rate 5 out of 5 stars. Most reviewers say that Interceptor is a new product that tastes and works great, even for their sensitive pets.

Concluding Thoughts

The most important thing that you should know about Interceptor is its power to protect your dog and/or cat from dangerous (and potentially fatal) intestinal parasites. Interceptor ensures that your pets will be safe from heartworms (and heartworm disease), roundworms, whipworms, and hookworms, and the infections that they cause.

DISCLAIMER: FDA law restricts Interceptor only on order or prescription of a licensed veterinarian for the best pet health care advice. Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427. This informative article is not meant to substitute for the diagnosis, treatment, and professional advice from your veterinarian or other qualified professionals regarding a medical condition. Ask your veterinarian if it 's a good idea to treat all of the animals in your household to control intestinal parasites.

Side Effects & Warnings

Side effects are rare, but can include depression, drowsiness, vomiting, loss of appetite, diarrhea, hypersalivation, seizures, and weakness.


Milbemycin Oxime


Dogs and pups 4 weeks and older

Weight / Dosage:

  • 2-10 Lbs / 1 Flavor Tab monthly (Brown Box)

  • 11-25 Lbs / 1 Flavor Tab monthly (Green Box)

  • 26-50 Lbs / 1 Flavor Tab monthly (Yellow Box)

  • 51-100 Lbs / 1 Flavor Tab monthly (White Box)

  • Over 100 Lbs / Give combination of Flavor Tabs based on weight
  • Cats and kittens 6 weeks and older

    Weight / Dosage:
  • 6.1-12 Lbs / 1 Flavor Tab monthly (Yellow Box)

  • 12.1-25 / 1 Flavor Tab monthly (White Box)

  • Over 25 pounds / Give combination of Flavor Tabs based on weight
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