Advantage II for Dogs Over 55 lbs, 6 Month (Blue) protects dogs from fleas for up to four weeks after application. Advantage II flea treatment contains Imidacloprid and Pyriproxyfen which kill existing fleas within 12 hours and regulate insect growth to break the flea life cycle. Safe for dogs over 7 weeks of age.

• Kills adult fleas within 12 hours of application
• Easy-to-use, pre-packaged applicators make it easy to protect your dog
• Controls current flea infestations on dogs
• Manufacturer information and usage

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