K9 Advantix Red kills 98100 of fleas on dogs within 12 hours and continues protection at least 4 weeks. Repels and kills a majority of ticks and mosquitoes. This is the ultimate protection for your dog Each packet contains 6 applications providing 6 months of protection. Protect your pet today. Effective Flea Tick Control . . . No Prescription RequiredGuaranteed US EPA approved. Each package of K9 Advantix for Dogs lasts 4 to 6 months (One vial per month) Kills 98100 of fleas within 12 hours helpful in dogs with Flea Allergy Dermatitis Protects against deadly Lyme Disease, spread by ticks Repels and kills mosquitos, carriers of dangerous West Nile Virus Waterresistant, easy to apply formula stays on in baths or in the rain CLICK HERE for additional information on K9Advantix.