K9 Advantix II for Medium Dogs (11-20 lbs) Teal Box

Monthly Topical Flea, Tick & Mosquito Protection

Product Description

K9 Advantix II for Medium 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.

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: A Single application provides continuous defense for a full month.

Ingredients 

Active Ingredients

Imidacloprid, Permethrin, and Pyriproxyfen.

Inactive Ingredients

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

Guaranteed Analysis  

Ingredient	% by Weight
Imidacloprid	8.80%
Permethrin*	44.00%
Pyriproxyfen	0.44%
Other Ingredients	46.76%
Total	100.00%

Note: cis/trans ratio – Maximum 55% (±) cis and Minimum 45% (±) trans.

Variants

Variants		Active Ingredients
Weight Range	Tube Volume	Imidacloprid Content	Permethrin Content	Pyriproxyfen Content
4-10 lbs	0.4 mL	3.52 mg	17.6 mg	0.176 mg
11-20 lbs	1.0 mL	8.8 mg	44 mg	0.44 mg
21-55 lbs	2.5 mL	22 mg	110 mg	1.1 mg
Over 55 lbs	4.0 mL	35.2 mg	176 mg	1.76 mg

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: This product is intended for dogs and puppies seven weeks or older. 
• Species Warning: Never apply this treatment to cats, as permethrin is highly toxic and potentially fatal to them.
• Child Safety: Keep all children away from the treated area until it has completely dried and is safe.
• Skin Sensitivity: Monitor your dog’s skin for irritation and consult a veterinarian if reactions continue beyond three days.
• Aquatic Toxicity: Prevent dogs from entering lakes, rivers, or other surface water for at least forty-eight hours after application. 

Possible Side Effects

• Skin Irritation: Some dogs may experience redness, scratching, or mild discomfort at the area where applied.
• Gastrointestinal Upset: In rare cases, dogs might show vomiting, diarrhea, or other digestive disturbances after application.
• Lethargy: Occasionally, dogs may display temporary reduced energy, tiredness, or lack of usual activity after treatment. 

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 parasites does K9 Advantix II Medium Dogs protect against?

Ans: K9 Advantix II Medium Dogs kills and repels fleas, ticks, mosquitoes, biting flies, and lice through topical contact. The formula works on contact, meaning parasites do not need to bite to be affected.

Q2: How often should K9 Advantix II Medium Dogs be applied?

Ans: K9 Advantix II Medium Dogs should be applied once every 30 days. Monthly application helps maintain continuous protection against fleas, ticks, and mosquitoes when used consistently according to the manufacturer’s labeled directions.

Q3: What weight range is K9 Advantix II Medium Dogs designed for?

Ans: K9 Advantix II Medium Dogs is specifically formulated for dogs weighing between 11 and 20 pounds. Using the correct weight-specific product helps ensure proper dosing and effective parasite protection throughout the month.

Q4: How quickly does K9 Advantix II start working?

Ans: K9 Advantix II begins killing fleas through contact shortly after application. The fast-acting topical formula helps reduce flea activity within the first day while continuing to provide protection for up to 30 days.

Q5: Is K9 Advantix II for Medium Dogs waterproof?

Ans: Yes. Once the application site has dried, typically within 24 hours, K9 Advantix II remains effective even after bathing or swimming, allowing dogs to maintain protection during normal water activities.

Q6: Can K9 Advantix II Medium Dogs be used on puppies?

Ans: K9 Advantix II Medium Dogs is approved for dogs and puppies 7 weeks of age and older that weigh between 11 and 20 pounds. Always confirm both age and weight before applying the product.

Q7: Can K9 Advantix II Medium Dogs be used on cats?

Ans: No. K9 Advantix II contains permethrin, which is toxic to cats. Cats should never be treated with this product and must be kept away from treated dogs until the application area is arid.

Q8: What side effects are listed for K9 Advantix II Medium Dogs?

Ans: The most commonly reported side effect is mild, temporary skin irritation at the application site. If irritation persists or worsens after application, discontinue use and consult a veterinarian for further guidance.