Australian Branded. Not for sale to USA. ** Please note that Interceptor is not available to our USA customers due to manufacturers trade restrictions ** INTERCEPTOR SPECTRUM (Chews), is a convenient and simple way to protect your dog against heartworm and the major intestinal worms. 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. Note!! Dogs should be vet tested (Adult Heartworm Clear) before giving this medication. Highly Recommended by Vets. Dosage and administration The dose can be added to a small meal or placed directly in the mouth, similar to tablet dosing. Color Weight (lb) Weight (kg) milbemycin oxime praziquantel Brown 2 - 10lbs 0 - 4kg 2.3mg 22.8mg Green 11 - 25lbs 4 - 11kg 5.75mg 57mg Yellow 26 - 50lbs 11 - 22kg 11.5mg 114mg Blue 51 - 100lbs 22 - 45kg 23mg 228mg (Not Available to the USA) We are unable to ship this product to the USA.