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K9 Advantix K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses

K9 Advantix

K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses

K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses is a vet-recommended topical flea, tick, and mosquito treatment for dogs weighing 11-20 lbs. Priced at $49.23, it offers 4 monthly applications, ideal for pet owners seeking reliable, long-term parasite protection with fast-acting, water-resistant formula.

$49.23

● In stock

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Key features

  • Fast-acting: kills fleas in 12 hours
  • Monthly protection with 4 doses included
  • Water-resistant after 24 hours
  • Repels and kills ticks, fleas, mosquitoes
  • Breaks pest life cycle by preventing egg hatching
  • Easy spot-on application along the back
  • Veterinarian-recommended brand

Pros

  • +Highly effective against multiple parasites
  • +Long-lasting monthly protection
  • +Water-resistant for active dogs
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Cons

  • Not safe for cats or dogs under 11 lbs
  • Contains permethrin, toxic to felines

About K9 Advantix K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses

What is K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses?

K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses is a veterinarian-trusted, topical parasite control solution designed specifically for medium-sized dogs weighing between 11 and 20 pounds. Each pack contains four easy-to-apply doses, providing up to four months of continuous protection against fleas, ticks, mosquitoes, and biting flies. The 'Aqua' formulation is optimized for fast absorption and enhanced water resistance, making it suitable for dogs that swim or are bathed regularly. Manufactured by Bayer, a leader in pet health, K9 Advantix uses active ingredients imidacloprid, permethrin, and pyriproxyfen to target multiple life stages of pests, breaking their reproductive cycle.

Key features

  • Fast-Acting Protection — Begins killing fleas within 12 hours and ticks within 48 hours of application.
  • Monthly Dosage — 4 pre-measured doses provide full coverage for four consecutive months.
  • Water-Resistant Formula — Stays effective after swimming or bathing, ideal for active dogs.
  • Broad-Spectrum Defense — Targets fleas, ticks, mosquitoes, and biting flies.
  • Pest Life Cycle Disruption — Prevents eggs from hatching, reducing reinfestation risk.
  • Easy Topical Application — Single-use tubes applied directly to the skin along the back.
  • Trusted Brand — Part of the K9 Advantix line by Bayer, widely used in veterinary practices.

Who is K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses for?

This product is ideal for dog owners with medium-sized pets weighing 11 to 20 lbs who live in areas with high flea and tick activity or who frequently take their dogs outdoors. It’s especially beneficial for households seeking a reliable, monthly preventive that also repels mosquitoes, which can carry heartworm disease. Not suitable for cats or dogs under 11 lbs.

How does K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses compare?

Compared to over-the-counter flea collars or sprays, K9 Advantix offers longer-lasting, systemic protection with proven efficacy. It outperforms many generic topical treatments in speed of kill and duration. Unlike oral preventives that require daily dosing, this topical solution provides a full month of coverage per application. However, it contains permethrin, which is toxic to cats, making it less suitable for multi-pet households than cat-safe alternatives like NexGard or Bravecto.

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Best use cases

  • Monthly flea and tick prevention
  • Mosquito repellent for heartworm-prone areas
  • Protection for dogs that swim or bathe often
  • Outdoor activity in wooded or grassy areas
  • Veterinary-recommended parasite control
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Is K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses right for you?

K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses is best for dog owners seeking a proven, monthly topical solution for flea, tick, and mosquito control. Suitable for pet owners with basic application skills. Not recommended for homes with cats. Alternatives include oral chews like NexGard or cat-safe topicals such as Frontline Plus.

How it compares: K9 Advantix offers faster kill times and broader insect repellency than standard polypropylene flea collars or generic topicals. It outperforms many OTC options in duration and efficacy but is less pet-inclusive than cat-safe oral chews like Bravecto.

Are There Active Pet Express Trading Company Coupons for This Product?

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Frequently Asked Questions

What does K9 Advantix protect against?

K9 Advantix protects dogs from fleas, ticks, mosquitoes, and biting flies. It kills fleas within 12 hours and ticks within 48 hours, while also repelling pests and preventing reinfestation by stopping egg development.

Does K9 Advantix work after swimming?

Yes, the Aqua formulation is water-resistant after 24 hours of application. It remains effective even if your dog swims or is bathed, making it ideal for active or outdoor dogs.

How often should I apply K9 Advantix?

Apply one dose monthly for continuous protection. Each pack contains four doses, covering four months of treatment. Consistent monthly use ensures optimal flea and tick control.

Is K9 Advantix safe for all dogs?

It is safe for dogs weighing 11-20 lbs and 8 weeks or older. Do not use on cats or dogs under 11 lbs, as permethrin can be toxic to felines and small breeds.

Can I use K9 Advantix with other medications?

Consult your veterinarian before combining K9 Advantix with other medications, especially heartworm preventives or sedatives, to avoid potential interactions.

How much does K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses cost?

K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses is $49.23 at Pet Express Trading Company. Prices may change — click through to Pet Express Trading Company for the latest.

Is K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses in stock at Pet Express Trading Company?

Yes, K9 Advantix Medium Dogs 11-20 Lbs (Aqua) 4 Doses is currently in stock at Pet Express Trading Company.

Are there coupon codes for Pet Express Trading Company?

Yes — Love Those Deals currently tracks 4 active Pet Express Trading Company coupons. See the coupons section on this page to copy a code before checkout.

Specifications

Brand
K9 Advantix
Product Type
Animals & Pet Supplies > Pet Supplies > Pet Flea & Tick Control
Category
Animals & Pet Supplies > Pet Supplies > Pet Flea & Tick Control
SKU
3915
GTIN
896762595539
MPN
K9-Advantix-3269
Last updated Apr 28, 2026