K9 Advantix Flea, Tick & Mosquito Prevention for Dogs over 55 lbs — Extra Large, 2-Treatment Pack, Monthly Waterproof Topical

K9 Advantix Extra Large Dog is a monthly topical treatment that kills and repels fleas, ticks, mosquitoes, biting flies, and lice for dogs over 55 lbs.

This two-dose pack provides a straightforward, affordable way to treat and prevent external parasites on larger dogs. Applied to a small area on the back of the neck, the waterproof formula becomes rain-resistant after 24 hours and begins working within about 12 hours of the first application. It’s intended for dogs at least 7 weeks old and weighing more than 55 pounds; it is not for use on cats. Always follow the product label directions for safe, effective use.

How quickly will K9 Advantix start to control fleas and ticks?

After the initial application, the topical solution begins to repel and kill adult fleas on contact, typically showing noticeable effect within 12 hours. It helps stop existing infestations and reduces the risk of new eggs being laid by adult fleas. Continued monthly use maintains protection against re-infestation.

• Begins working within approximately 12 hours
• Kills and repels adult fleas on contact before biting
• Monthly application maintains ongoing protection

How is K9 Advantix applied and how often should I use it?

Apply the solution topically directly to the skin at a spot on the dog’s back between the shoulder blades where your dog can’t lick it. The treatment is designed for once-per-month application; this package includes two monthly treatments. Allow the area to dry and avoid bathing for 24 hours after application to achieve waterproof protection.

• Single spot application between shoulder blades
• Repeat every 30 days for continued protection
• Waterproof after 24 hours—avoid bathing immediately

What parasites does this product cover and are there any safety notes?

K9 Advantix addresses a range of external parasites including fleas, multiple tick species, mosquitoes, biting flies, and lice. It’s fragrance-free and formulated specifically for dogs over 55 lbs. Important safety points: do not use on cats, follow label dosing by weight and age, and consult a veterinarian with any health or pregnancy-related concerns.

• Protects against fleas, ticks, mosquitoes, biting flies, and lice
• Fragrance-free topical; suitable for dogs 7 weeks and older over 55 lbs
• Not for use on cats—follow label instructions carefully

How does K9 Advantix compare to collars or oral treatments?

This topical drops solution offers a balance of fast contact activity and convenience without requiring swallowing a pill or wearing a collar. Because it spreads across the skin’s surface, it can kill parasites on contact and repel mosquitoes and biting flies. For households with multiple pets or cats, consider product compatibility and consult a vet for an integrated parasite-control plan.

• Topical drops act on contact without ingestion
• Generally quicker visible effect than many collars
• Works as part of a broader parasite-control routine

Who is this for: K9 Advantix Extra Large Dog is aimed at owners of large dogs (over 55 lbs., at least 7 weeks old) who want a monthly, easy-to-apply solution to repel and kill fleas, ticks, mosquitoes, biting flies, and lice. It’s a good option for active dogs that spend time outdoors or for households looking for a value-minded, waterproof topical treatment. For multi-pet homes—especially those with cats—review safety instructions and consult your veterinarian to choose the right parasite control strategy.

Ingredients

Imidacloprid, Permethrin