K9 Advantix II For Dogs kills fleas which may cause flea allergy dermatitis (FAD). Advantix II For Dogs kills 98-100% of the existing fleas on dogs within 12 hours. Re-infesting fleas are killed within 2 hours with protection against further flea infestation lasting at least four (4) weeks. Pre-existing pupae in the environment may continue to emerge for six (6) weeks or longer depending upon the climatic conditions. K9 Advantix II Dog Flea & Tick Drops remains an efficacious tick and flea treatment following a shampoo, swimming, or after exposure to rain or sunlight. For best results, use a hypo-allergenic shampoo or any shampoo labeled "detergent Free" if bathing is needed. Monthly tick & flea treatment is required for optimal control and prevention of fleas and ticks. Does not expire if package remains unopened!
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