Barrier Topical Solution for Cats, 9.1-18 lbs, (Purple)

Barrier Topical Solution for Cats 9.1–18 lbs (Imidacloprid + Moxidectin)

Topical Flea, Worm & Heartworm Treatment 

Barrier for Cats 9.1–18 lbs is a once-a-month topical parasiticide treatment that combines two proven active ingredients—imidacloprid and moxidectin—to provide broad-spectrum protection against external and internal parasites in cats. This veterinary-approved formula is specially designed for large cats weighing between 9.1 and 18 lbs and over 9 weeks of age.

By offering fast-acting flea control and long-lasting protection against heartworms, roundworms, and hookworms, Barrier is an effective monthly treatment that competes with higher-priced prescription brands like Advantage Multi for Cats. Trusted by veterinarians and pet parents alike, this topical solution ensures your feline remains parasite-free with minimal effort.

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

NOTE: For generic medications, the product image shown may not reflect the actual item received. Generic medications can vary in size, color, and shape between orders depending on the manufacturer. Additionally, your medication may arrive packaged in a HardyPaw Pharmacy vial.

Also Available in Other Weight Ranges

Barrier Topical Solution for Cats is available in multiple strengths to provide accurate dosing based on your cat's weight. Selecting the correct variant ensures safe and effective parasite protection.

• Barrier for Small Cats 2.1–5 lbs – Light Blue: Ideal for extra small cats and kittens over 9 weeks of age.
• Barrier for Medium Cats 5.1–9 lbs – Orange: Great for small to medium adult cats requiring monthly parasite prevention.

What Are the Benefits of Barrier for Large Cats?

Barrier offers multi-parasite protection in one simple dose. Here's how it benefits your cat:

• Fast-acting Flea Elimination: Kills adult fleas within 12 hours of application to prevent flea infestations.
• Internal Worm Protection: Treats and controls hookworms (Ancylostoma tubaeforme) and roundworms (Toxocara cati).
• Heartworm Disease Prevention: Prevents development of Dirofilaria immitis, the parasite responsible for heartworm disease.
• Easy Topical Application: Single monthly dose with no need for oral administration.
• Affordable Prescription Alternative: Delivers results comparable to branded products like Revolution Plus and Advantage Multi at a lower cost.

How Does Barrier for Cats Work?

The efficacy of Barrier for Cats relies on the synergistic action of its two active ingredients:

Both ingredients are absorbed transdermally, offering systemic protection and long-lasting effects with a single topical dose.

Dosage and Administration

Always consult your veterinarian for exact dosage instructions depending on your pet's condition.

• Use only on cats weighing 9.1 to 18 lbs and over 9 weeks old
• Apply one 0.8 mL tube topically once every 30 days
• Part the fur at the base of the neck and apply directly to the skin
• Avoid contact with treated area until dry

⚠️ Important Administration Notes:

• Do not use on ferrets – this dosage is for cats only
• Do not apply more than once a month
• Children and pets should not touch the application site for 30 minutes after use

What Are the Ingredients in Barrier Topical Solution?

Are There Side Effects or Warnings?

Common Side Effects:

• Mild skin irritation or redness at the application site
• Excessive grooming or temporary lethargy
• Rare: drooling or vomiting if ingested during grooming

Warnings:

• Not for kittens under 9 weeks of age
• For topical use only—not to be ingested
• Keep out of reach of children and other animals
• Do not use on cats under 9.1 lbs

If your cat exhibits unusual symptoms, contact a veterinarian immediately.

Shipping & Returns 

Shipping Policy: HardyPaw offer all types of shipping options (Ground, Express, Priority, International) depending on the urgency of the product requirements. To know about our shipping policy in detail, click here.

Refund policy: If you face any issue with our product and want to return it, read our refund policy carefully.

Barrier for Cats 9.1-18 lbs FAQs 

Is Barrier for Cats waterproof after application?

Yes, Barrier is water-resistant after the solution has fully dried, typically within 24 hours. Bathing your cat or exposure to water before this time may reduce effectiveness.

Can I apply Barrier for Cats on pregnant or lactating cats?

Use in pregnant or nursing cats has not been thoroughly studied. Always consult your veterinarian before using this product on breeding, pregnant, or lactating cats.

What should I do if multiple cats groom each other after application?

To prevent ingestion, keep treated cats separated until the application site is dry—usually for about 30 minutes. Ingesting the product may cause salivation or vomiting.

Does Barrier for Cats kill flea eggs and larvae too?

Barrier kills adult fleas before they can lay eggs, effectively breaking the flea lifecycle, but it does not directly kill flea eggs or larvae.

Can Barrier be used year-round or only seasonally?

Veterinarians recommend using parasite prevention like Barrier year-round, as fleas and heartworm-transmitting mosquitoes can remain active in indoor and mild-climate environments.

Trusted Veterinary References

• Imidacloprid – Flea Control Mechanism (NPIC)
• Moxidectin – Antiparasitic Applications in Skin Disease (MSD Veterinary Manual)
• Feline Heartworm Disease Overview (American Heartworm Society)
• Ear Mites in Cats – Causes and Treatment (VCA Hospitals)