Frontline Top Spot for Dogs 0-22 lbs, 12 Month (Orange) starts working right away and kills all existing fleas on your pet within 24 hours. The main ingredient, Fipronil, collects in the oils of the skin and hair follicles, and continues to be released from hair follicles onto the skin and coat, resulting in long-lasting flea and tick control.

• Breaks the flea lifecycle to prevent further infestations
• Waterproof--effective after swimming or shampooing
• Effective against American dog ticks, deer ticks, brown dog ticks, and lone star ticks
• Manufacturer information and usage

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