About This Advantus (imidacloprid) is a flavored soft chew that, with one dose, starts killing adult fleas within one hour so your dog can get back to enjoying life This chewable flea treatment is available without a prescription Treats flea infestations on dogs and puppies 10 weeks of age and older and weighing from 4 - 22 lbs. Easy-to-give soft chew that can be administered to your dog as often as once daily if they become re-infested Advantus is also available for large dogs ranging in weight between 23 and 110 lbs. Overview Brand : Advantus Item Form : Chew Scent : Unscented Item Weight : 0.1 Pounds Active Ingredients : Imidacloprid Item Volume : 16.5 Cubic Inches Allergen Information : Allergen-Free Age Range (Description) : 10 weeks and older UPC : 724089454386 Global Trade Identification Number : 00724089454386