24 1/2% Off Retail, You Save $26! Stop Fleas! Advantage quickly kills 90% of all fleas within 12 hours after application. Safe and effective formula contains fast-acting Imidacloprid which attacks the flea's nervous system to eliminate fleas on contact. Kills fleas before they lay eggs to prevent re-infestation. Waterproof formula won't wash off and continues working even when dog gets wet. Easy-to-use: just part hair on pet's back between shoulders and apply to skin. Safe for dogs and puppies over 7-weeks-old. 4-month supply of Advantage comes in formulas for 4 weight ranges for dogs to ensure accurate dosing and maximum effectiveness Caution: Do not use on other animals. Keep out of reach of children. For external use on dogs. For use on dogs over 7 weeks old. Use monthly. Consult a veterinarian before using on pregnant, aged, ill, or nursing animals.Caution: Causes eye irritation. Harmful if swallowed. Do not get in eyes or on clothing. Avoid contact with skin. Wash hands thoroughly with soap and warm water after handling. Active Ingredient: Imidacloprid. Back to Health and Beauty