Comfortis for Dogs is a chewable beef-flavored tablet which kills fleas as well as prevents further pests for an entire 30 days. Comfortis is FDA approved and should be utilized on dogs Fourteen weeks of age or even older. You must have the prescription from your vet to order Comfortis. Comfortis works by utilizing Spinosad, its active ingredient, in order to assault the anxious systems of fleas and other insects, leading to paralysis and dying. Comfortis starts killing fleas and other insects within 30 minutes, prior to they can lay ova! 6 monthly dosages of Comfortis will safeguard your dog for a entire 6 months! Side effects might occur, and include depression/lethargy, vomiting, ataxia, itching, diarrhea, seizures as well as hypersalivation. Comfortis has been found to be securely used with heartworm preventatives that contain which (Such as Heartgard Plus as well as Iverhart Plus) when individuals products are used according in order to label directions. When your veterinarian prescribe the additional label use of the heartworm preventative (e.grams., to treat non-responsive demodectic mange and other problems) your dog may experience salivation/drooling, trembling/twitching, dilating pupils, seizures, blindness and confusion. If your pet encounters any of the above symptoms, or else you notice other variations in behavior or a decrease/increase in urge for food, contact your veterinarian.