skip to main content

Advantix II K9 Flea Tick & Mosquito Treatment Large Dog 21-55 lbs -- 4 Tubes

Advantix II K9 Flea Tick & Mosquito Treatment Large Dog 21-55 lbs
  • Our price: $68.41

    Sale price: $58.15

    Our price: $68.41

    Free Shipping!

    Last Chance!

  • +

Advantix II K9 Flea Tick & Mosquito Treatment Large Dog 21-55 lbs Description

  • Large Dog 21-55 lbs
  • Topical Prevention and Treatment of Fleas, Ticks, Mosquitoes, Biting flies and Lice
  • For Monthly Use ONLY on Dogs and Puppies 7 Weeks of Age and Older and Weighing 21-55 lbs.
  • Waterproof
  • Repels and Kills ticks • Repels and Kills fleas • Repels and Kills Mosquitoes

  • Repels and kills ticks including Deer ticks (vector of Lyme disease), American dog ticks (vector of Rocky Mountain spotted fever), Brown dog ticks (vector of Ehrlichiosis) and Lone Star ticks (vector of Ehrlichiosis) for up to four weeks
  • Repels and kills all life stages of fleas
  • Prevents fleas on treated dogs from infesting your home
  • Kills fleas on dogs within 12 hours  and continues to prevent infestations for a month
  • Prevents development of all flea stages for a month
  • Larval flea stages in the dog's surroundings are killed following contact with a K9 Advantix® II treated dog
  • Repels and kills mosquitoes for up to four weeks
  • Repels and prevents blood-feeding by biting flies
  • Kills chewing lice


For Directions for Use, Storage and Disposal, and First Aid, see package insert.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Ingredients: Active Ingredients (% by Weight):
Imidacloprid (8.80%)
Permethrin* (44.00%)
Pyriproxyfen (0.44%)
Other Ingredients (46.76%)
Total (100.00%)
*cis/trans ratio: max 55% cis and min 45% (+/-) trans

Precautionary Statements

Hazards to Humans

WARNING. Causes substantial but temporary eye injury. Do not get in eyes or on clothing. Harmful if swallowed. Avoid contact with skin or clothing. Harmful if absorbed through skin. Avoid contact with skin. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet. Remove and wash contaminated clothing before reuse.


Hazards to Domestic Animals

For external use on dogs only. Do not use on animals other than dogs. Do not use on puppies under seven 7 weeks of age. Do not get this product in dog's eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, pregnant or nursing animals. Individual sensitivities, while rare, may occur after using ANY pesticide product for dogs. If signs persist, or become more severe, consult a veterinarian immediately. If your animal is on medication, consult your veterinarian before using this or any other product.


Environmental Hazards

This product is extremely toxic to aquatic organisms, including fish and invertebrates. Do not add directly to water. Do not contaminate water when disposing of product or packaging.


Side Effects

Monitor  your dog after application. Side effects, although very rare, may include signs of skin irritation such as redness, scratching or other signs of discomfort. Gastrointestinal signs such as vomiting or diarrhea have also been reported. If these or other side effects (such as lethargy or agitation) occur, consult your veterinarian or call 1-800-422-9874.



Keep cats away from treated dogs for 24 hours. If applied to a cat or ingested by a cat, contact your veterinarian immediately.

The product you receive may contain additional details or differ from what is shown on this page, or the product may have additional information revealed by partially peeling back the label. We recommend you reference the complete information included with your product before consumption and do not rely solely on the details shown on this page. For more information, please see our full disclaimer.

Vitacost is not responsible for the content provided in customer ratings and reviews. For more information, visit our Terms of Use.

Sign Up & Save

Get exclusive offers, free shipping events, expert health tips & more by signing up for our promotional emails.

  • Instant Online Service
  • 1-800-381-0759

    Monday-Friday 8am-9pm EST

    Saturday: 9:30am-6pm EST

    Sunday: Closed

Please enter a valid zip code