K9 Advantix II for Large Dogs (21-55 lbs) Red Box

Monthly Topical Flea, Tick & Mosquito Protection

Product Description

K9 Advantix II for Large Dogs provides broad-spectrum, waterproof protection against fleas, ticks, mosquitoes, biting flies, and lice through contact-kill action without painful biting. This once-monthly topical treatment combines imidacloprid, permethrin, and pyriproxyfen to kill all flea life stages, prevent re-infestation, and provide four weeks of continuous protection.

Ingredients

Active Ingredients

Imidacloprid 8.80%, Permethrin 44.00%, Pyriproxyfen 0.44%

Inactive Ingredients

Propylene glycol, benzyl alcohol, polyethylene glycol, and other inert ingredients

Variants/Types

How to Use

Dosage & Administration Instructions

• Weight Verification: Confirm the dog weighs between 21 and 55 lbs for the large dog formulation.
• Tube Preparation: Cut pouch, remove tube, peel foil, twist cap to break seal.
• Application: Part fur from shoulders to tail base, apply directly to skin.
• Distribution: Squeeze contents in 3-4 spots to prevent run-off from a single location.
• Monthly Schedule: Reapply every four weeks for continuous year-round protection.

Additional Information

Precautions

• Age Restriction: Only use on dogs and puppies seven weeks or older.
• Species Warning: Never use on cats; permethrin is toxic to felines.
• Child Safety: Keep children away from treated dogs until the application site dries.
• Skin Sensitivity: Monitor for irritation; consult a veterinarian if reactions persist beyond three days.
• Aquatic Toxicity: Prevent treated dogs from entering surface water for 48 hours after application.

Possible Side Effects

• Skin Irritation: Redness, scratching, or discomfort may occur at the application site.
• Gastrointestinal Upset: Vomiting or diarrhea reported in rare cases.
• Lethargy: Temporary decreased energy levels may be observed occasionally.

Benefits

• Contact Kill: Eliminates parasites on contact without requiring bites or feeding.
• Broad Spectrum: Controls fleas, ticks, mosquitoes, biting flies, and lice effectively.
• Flea Lifecycle: Kills all flea stages, including eggs, larvae, and adults, completely.
• Waterproof Formula: Maintains effectiveness after bathing, swimming, or rain exposure.
• Four-Week Protection: Single application provides continuous defense for full month.

Shipping & Return

We offer ground, express, priority, and international delivery; see our shipping policy for details.

For return instructions or product concerns, please refer to our detailed refund policy.

Frequently Asked Questions

Q1: What pests does K9 Advantix II Large Dogs (Red Box) protect against?

Ans: K9 Advantix II Topical Flea & Tick Protection for Large Dogs targets fleas and ticks and also helps protect against mosquitoes, biting flies, and lice. The topical application kills and repels through contact for month-long coverage.

Q2: What dog weight range is K9 Advantix II Red Box made for?

Ans: K9 Advantix II Topical Flea & Tick Protection for Large Dogs is formulated for dogs weighing 21–55 lbs. Using the correct weight range helps ensure proper dosing and consistent protection for the full month.

Q3: How often should K9 Advantix II be applied to large dogs?

Ans: Apply one tube of K9 Advantix II to a dog weighing 21–55 lbs every 30 days. Monthly application helps maintain continuous protection and reduces the chance of new flea or tick infestations.

Q4: How do you apply K9 Advantix II correctly on a dog?

Ans: Part the hair and apply the full tube directly on the skin in 4–6 spots along the back from the shoulders to tail base. Avoid placing too much in one spot to prevent runoff.

Q5: Can K9 Advantix II be used after bathing or swimming?

Ans: K9 Advantix II can be used around bathing routines, but the dog must be dry at application. Keep the dog dry for 24 hours after use to help the waterproof protection set properly.

Q6: Is K9 Advantix II safe for puppies?

Ans: K9 Advantix II Large Dogs is only for dogs and puppies 7 weeks and older that weigh at least 21 lbs. Always confirm age and weight before applying any topical parasite control product.

Q7: What precautions are important around cats when using K9 Advantix II?

Ans: K9 Advantix II should never be used on cats because the formulation can be dangerous or fatal. Keep cats away from treated dogs until the application area is completely dry, and contact a veterinarian immediately if exposure occurs.

Q8: What side effects can occur after applying K9 Advantix II?

Ans: Some dogs may show temporary skin irritation, such as redness or scratching. Vomiting, diarrhea, lethargy, or agitation have also been reported. Contact a veterinarian if any reaction persists, worsens, or appears severe.