K9 Advantix II XL for Dogs Over 55 lbs – Vet-Recommended Flea, Tick & Mosquito Protection (1-Month Supply)

Comprehensive protection for large dogs

K9 Advantix II XL is a veterinarian-recommended topical treatment designed for dogs over 55 pounds. It covers five common pests—fleas, ticks, mosquitoes, biting flies and lice—delivering both kill and deterrence on contact. The fragrance-free formula is designed for everyday wear, and it remains effective even after outdoor adventures or baths. No prescription is required, and it comes in convenient dose packs for monthly care.

How it works in the real world

As soon as you apply the spot-on, fleas in the coat start to die within about 12 hours. Because the product kills fleas on contact, the pests don’t need to bite your dog to be eliminated. Ticks and mosquitoes are repelled by the same protective layer, helping your dog stay comfortable during park visits and strolls on hot days. The formula is waterproof after 24 hours, so rain, splashes, and regular activity won’t wipe out the protection.

What’s included and how to use

The routine is simple: apply monthly to dogs over 55 pounds and at least 7 weeks old. It works indoors and outdoors, so it suits apartment living and homes with yard access. The product is fragrance-free for sensitive noses, and there’s no need for pills or collars. Always reference the product label for complete directions and any known considerations.

Key benefits you can expect

• Kills fleas within 12 hours of applying
• Kills fleas on contact and repels ticks and mosquitoes
• Fragrance-free formulation suitable for sensitive noses
• Waterproof after 24 hours, so it stays in place during play or rain
• No prescription required
• Easy-to-use spot-on application; no pills or collars needed
• Suitable for indoor or outdoor dogs
• Available in 2-dose, 4-dose, and 6-dose packs for monthly use

Choosing the right pack for your dog

Available in 2-dose, 4-dose, and 6-dose packs to fit your calendar and the length of the season. Pick a kit that matches your dog’s weight and your preferred replenishment rhythm.

Safety and care tips

Always read the label for complete directions and any potential side effects. If your dog has a medical condition or is pregnant, consult a veterinarian before use. Store out of reach of children and ensure the application area is dry before handling. This product is designed for dogs older than 7 weeks and weighing over 55 pounds.