Interceptor® Spectrum Tasty Chews (milbemycin oxime, praziquantel)

Interceptor® Spectrum Tasty Chews (milbemycin oxime, praziquantel)

Interceptor Spectrum Product image

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.


Dog Heartworm 1

Heartworms are the deadliest of all canine parasites


Tape Worm

Tapeworms are common parasites of the small intestine of dogs and cats.

The product information provided in this site is intended for Australian residents only. Please note that not all products listed within this site may be available in all countries. Also, prescribing information and indications for products may differ from country to country, so please consult your local veterinarian for local prescribing and any other information you may be interested in.