Note: Comfortis is being replaced by a new product Credelio that also kills four types of common ticks.

Customers are recommended to order the new product.

Comfortis is the first FDA-approved, chewable tablet that kills fleas and prevents flea infestations on dogs for a full month. Only Comfortis offers you all of these benefits in a single product: Starts killing fleas within 30 minutes. Lasts a full month. Kills fleas before they can lay eggs. The convenience of a chewable, synthetic beef-flavored tablet. Spinosad, the active ingredient in Comfortis, is environmentally friendly.

Manufacturer: Elanco Animal Health