K9 Advantix II Flea & Tick for Extra Large Dogs Over 55 lbs (Blue Box)

Monthly topical protection from K9 Advantix II for extra large dogs over 55 lbs: the triple-active formula (imidacloprid 8.8% + permethrin 44.0% + pyriproxyfen 0.44%) kills and repels fleas, ticks, mosquitoes, biting flies and lice on contact — parasites don't need to bite to be affected — and kills all flea life stages to prevent re-infestation. One application protects for four weeks and stays waterproof once dry (keep out of surface water for 48 hours). For dogs and puppies 7 weeks and older. Never use on cats, and keep cats away from treated dogs until the site is dry.

Key Benefits

• Kills and repels fleas, ticks and mosquitoes on contact
• Also controls biting flies and lice
• Kills all flea life stages and prevents re-infestation
• Waterproof once dry — bathing and swimming OK
• Four weeks of protection per monthly application

Specifications

• Brand: K9 Advantix II (Elanco)
• Active ingredients: imidacloprid 8.8%, permethrin 44.0%, pyriproxyfen 0.44%
• For: dogs over 55 lbs, 7 weeks and older — dogs only, NEVER cats
• Use: apply one tube monthly in 3–4 spots along the back; keep children away until dry; no surface water for 48 hours
• Options/prices: 4 doses $75.99; 6 doses $105.99; 6 doses 2-pack $211.98
• Price: from $75.99
• Availability: in stock

Quick answers

Does it repel mosquitoes too?
Yes — Advantix II both kills and repels mosquitoes, unlike flea-only topicals, and also covers ticks, biting flies and lice.

Can I use it on my cat?
Never — permethrin is extremely toxic to cats. Keep cats away from treated dogs until the application site is fully dry.

Is it waterproof?
Yes — once the site dries (about 24 hours) it remains effective through bathing and swimming; keep dogs out of surface water for the first 48 hours.

Is it in stock?
Yes — in stock from $75.99.