Simparica Chewables for Dogs vs NexGard PLUS Chewable

Both are monthly beef-flavored chews that kill fleas and ticks, but they are not the same job. Simparica is a single-ingredient sarolaner tablet that does fleas and ticks only, and it starts killing fleas fast. NexGard PLUS adds moxidectin and pyrantel, so it also prevents heartworm disease and treats roundworm infections, and it is labeled for puppies from 8 weeks. Choose Simparica for a straightforward flea-and-tick chew for a dog already covered for heartworm. Choose NexGard PLUS to cover fleas, ticks, heartworm and roundworms in one monthly chew.

• Choose the Simparica if your dog already gets a separate heartworm preventive and you want a simple monthly flea-and-tick chew that acts quickly.
• Choose the NexGard PLUS if you want one monthly chew that covers fleas, ticks, heartworm disease and roundworms, or you have a puppy at least 8 weeks old.