Heartgard Plus is a monthly soft chew for medium dogs weighing 12 to 22kg. Each dose prevents heartworm disease and treats roundworms and four species of hookworms — a focused intestinal worm protocol without the broader parasite coverage of combination products. The green-labelled variant is colour-coded to this weight class. Made with real beef, most dogs take it as readily as a treat.

The active combination is ivermectin and pyrantel. Ivermectin prevents Dirofilaria immitis larvae from developing into adult heartworms — important because treating established heartworm infection is significantly more complex and risky than prevention. Pyrantel clears the intestinal worm burden, targeting roundworms and four hookworm species. Heartgard Plus does not cover fleas, ticks, or mites, so it's commonly used alongside a separate external parasite treatment.

Heartgard Plus suits owners who want a reliable, established heartworm prevention product without the complexity of a multi-parasite combination chew. Ivermectin has a long track record in veterinary medicine; this is a straightforward product that covers its stated purpose without unnecessary additions.