Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs

Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs

Are you tired of dealing with fleas, ticks, and mosquitoes bothering your beloved furry friend? Look no further than Bayer K9 Advantix II. This innovative product provides effective pest protection for large dogs weighing between 21-55 lbs.

Why Choose K9 Advantix II?

K9 Advantix II is a veterinarian-recommended solution that delivers pest protection through topical action. It not only repels and kills fleas, ticks, and mosquitoes but also eliminates flea eggs, larvae, and lice. This comprehensive protection ensures that your dog is safe from various pests that can cause discomfort and transmit diseases.

Powerful Ingredients

K9 Advantix II combines the power of imidacloprid and permethrin with the insect growth regulator pyriproxyfen. This unique formulation interferes with the hormone signaling of molting insects, preventing fleas in immature stages from molting. As a result, these fleas are unable to develop into adults, effectively breaking the flea life cycle.

Long-Lasting Effectiveness

With just one monthly application, K9 Advantix II provides continuous protection for your dog. It starts killing fleas within 12 hours of application and also kills reinfesting fleas within 2 hours. The waterproof formula ensures that the product continues to work even after a bath or weekly swimming.

Protection Against Tick-Borne Diseases

K9 Advantix II not only protects against fleas and mosquitoes but also safeguards your dog from ticks that may transmit harmful organisms. These organisms can cause diseases such as Lyme disease, Rocky Mountain spotted fever, Ehrlichiosis, and Anaplasmosis. By using K9 Advantix II, you can have peace of mind knowing that your dog is protected against these potentially serious illnesses.

Safe for Puppies

K9 Advantix II can be used on puppies as young as 7 weeks old, making it suitable for dogs of all ages. The easy-to-follow application instructions on the back of every package ensure that you can apply the product correctly and effectively.

  • Repels and kills ticks, fleas, and mosquitoes
  • Repels biting flies
  • Kills lice
  • Kills all life stages of fleas
  • Prevents development of fleas, flea eggs, and larvae
  • Protects against tick-borne diseases
  • Waterproof formula
  • One application lasts for a month

Frequently Asked Questions

1. Can K9 Advantix II be used on cats?

No, K9 Advantix II is specifically formulated for dogs and should not be used on cats. It is important to use the appropriate product for each species to ensure their safety and effectiveness.

2. How often should I apply K9 Advantix II?

Under normal conditions, K9 Advantix II is effective for a month. However, in cases of severe flea infestation, retreatment may be necessary earlier than four weeks. Do not retreat more often than once every seven (7) days. Once flea control is attained, you can return to a monthly retreatment schedule.

3. Is K9 Advantix II safe for puppies?

Yes, K9 Advantix II can be used on puppies as young as 7 weeks old. It is important to follow the application instructions provided to ensure the safety and effectiveness of the product.


Protecting your large dogs from fleas, ticks, and mosquitoes is essential for their health and well-being. With Bayer K9 Advantix II, you can provide your furry friend with the effective pest protection they need. This topical treatment is easy to apply, starts working within 12 hours, and continues to protect for 30 days. Say goodbye to pesky pests and keep your dog happy and healthy with K9 Advantix II.