Interceptor Spectrum is a monthly chicken-flavoured chew for medium dogs weighing 11–22kg. It prevents heartworm disease and treats the full range of common intestinal worms in a single palatable dose. The yellow colour-coding identifies this as the medium size within the Interceptor Spectrum range.

The formula contains milbemycin oxime and praziquantel, covering heartworm prevention alongside treatment of adult roundworm (including immature Toxocara canis stages), hookworm, whipworm, and tapeworm species including Echinococcus — a species relevant for dogs with regular exposure to livestock environments. Safe from 2 weeks of age and approved for use in breeding, pregnant, and lactating dogs. Most dogs accept the chew without additional encouragement.

The breadth of worm coverage — particularly the inclusion of Echinococcus tapeworm species — makes Interceptor Spectrum a practical choice for dogs that spend time outdoors or on rural properties. For owners who prefer to manage flea control separately, it pairs cleanly with topical flea treatments without duplication.