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Heartworm Preventives and Treatments
Many types of heartworm preventives are available for use in dogs, cats, and even ferrets. Some may also treat or prevent other parasitic infections. Medications used to treat heartworm disease are different than those used to prevent it.
 
Diethylcarbamazine 
Imidacloprid plus Moxidectin (Advantage Multi) 
Ivermectin 
Melarsomine 
Milbemycin Oxime 
Moxidectin (Advantage Multi®, ProHeart® 6) 
Selamectin 
Heartworm