Comfortis treats fleas and flea infestation in dogs and puppies. The beef-flavour makes it easy to administer in dogs. Comfortis is 98% effective in treating fleas within 4 hours of administration. Within 30 minutes, its fast acting formula starts attacking fleas and controls further flea infestation. This oral treatment prevents flea-infested diseases such as Flea Allergy Dermatitis. Please Note - This product is recommended for both dogs and cats. For the specifics, please refer to the product box.