It is one of the most widely used medications for preventing heartworm infection in dogs (it's also used in cats for the same purpose but to a lesser extent). (thesprucepets.com)
There are a variety of options for preventing heartworm infection in both dogs and cats, including daily and monthly tablets and chewables, monthly topicals and a six - month injectable product available only for dogs. (baldwinanimalhospital.com)
Heartgard & Heartgard Plus pet meds prevent heartworm infection and heartworm disease in dogs and cats by killing the larvae in the tissue stage. (vetdepot.com)