Interceptor Large 22-45KG Blue


Monthly tasty chew for the prevention and control of heartworm and intestinal worms in dogs. Available in different pack sizes.

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Monthly tasty chew for the prevention and control of heartworm and intestinal worms in dogs. Available in different pack sizes.

Product Type

Monthly tasty chew for the prevention and control of heartworm and intestinal worms in dogs.


Interceptor Spectrum Tasty Chews active ingredients are milbemycin oxime and praziquantel.

Milbemycin oxime interferes with nerve transmission in invertebrates, which helps protect against heartworm, roundworm, hookworm and whipworm (minimum dose rate: 0.5mg/kg).

Praziquantel causes muscle spasm in tapeworm, which are then attacked by enzymes and disintegrate (minimum dose rate: 5mg/kg). It kills all intestinal forms of tapeworm except Spirometra spp, which require a higher than standard dose rate.


Interceptor Spectrum Tasty Chews prevent heartworm (Dirofilaria immitis) and control roundworm (Toxocara canis, Toxascaris leonina), whipworm (Trichuris vulpis), hookworm (Ancylostoma caninum, Uncinariastenocephala) and adult tapeworm (Echinococcus granulosus, Dipylidium caninum, Taenia pisiformis) in dogs.

Dosage and Administration

The dose can be added to a small meal or placed directly in the mouth, similar to tablet dosing.

Once a month, ideally on the same date.

If a dose is overdue by <15 days, treat immediately and resume monthly dosing.

If a dose is missed by 15-30 days, heartworm prevention can be maintained if treated immediately and monthly dosing resumes for at least the next 2 months.

If a dose is missed by >60 days, a veterinarian must be consulted in case the animal has contracted heartworm. Dosing may be recommenced, and a blood test for adult heartworm must be performed after 6 months.

Dog weight

Dose size

Pack colour


Very small dogs



Small dogs



Medium dogs



Large dogs


Worming schedule


2, 4, 8, 12 weeks of age, then monthly


Once a month

Pregnant bitches

At mating, before whelping, then monthly

Formulations and Packaging: 
Interceptor Spectrum Tasty Chews containing 2.3mg milbemycin oxime and 22.8mg praziquantel in orange pack.
Interceptor Spectrum Tasty Chews containing 5.75mg milbemycin oxime and 57mg praziquantel in green pack.
Interceptor Spectrum Tasty Chews containing 11.5mg milbemycin oxime and 114mg praziquantel in yellow pack. 
Interceptor Spectrum Tasty Chews containing 23mg milbemycin oxime and 228mg praziquantel in blue pack.

Interceptor Spectrum Tasty Chews are flavoured with real cooked chicken. Chicken meat is cooked, ground and dried before being added to the formulation. Studies have shown that Interceptor Spectrum Tasty Chews are so palatable that 94% of dogs accept them straight from the hand.

Interceptor Spectrum Tasty Chews come in packs of three (a 3-month supply) and six (a 6-month supply).


Interceptor Spectrum Tasty Chews can be safely used in puppies from 2 weeks of age, breeding males and females, pregnant females, and in collies sensitive to ivermectin.

If an animal with adult heartworm infection (and therefore circulating microfilariae) is given Interceptor Spectrum Tasty Chews, a transient shock-like reaction can occur. To avoid this, dogs should be tested for adult heartworm and treated if necessary, before starting Interceptor Spectrum Tasty Chews.

Studies have confirmed safety at up to 10 times the recommended dose.


By (Oakhurst, Australia) on19 Nov. 2017 (Interceptor Large 22-45KG Blue) :

Great product

Effective product that controls heartworms, whipworms, tapeworms, roundworms and hookworms. Basically all the worm family are covered in this once a month chew. Now that we give our greyhound this once a month I can be assured that he is worm free and not at risk of heartworm.

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By (Spring Farm, Australia) on10 Dec. 2015 (Interceptor Large 22-45KG Blue) :

Does the job

Does hat it is supposed to do. My dog eats it as a treat so it must taste good!

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By (Cordeaux heights, Australia) on11 Jan. 2015 (Interceptor Large 22-45KG Blue) :

easy to administer, great profile

my dog took this right out of my hand no problem. when comparing products this one has a great range of worms that it will kill and is the most affordable. I will be purchasing again in 6 months time (when my pack of 6 is finished).

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