Midamox Topical Solution for Cats, 9.1-18 lbs, Purple Box

Heartworm and Parasite Protection Spot-On for Large Cats

Product Description

Midamox Topical Solution for Cats 9.1–18 lbs is an FDA-approved prescription monthly spot-on parasiticide for large cats and kittens nine weeks and older. Each purple-box applicator contains imidacloprid and moxidectin, providing broad protection against heartworm disease, flea infestations, ear mites, roundworms, and hookworms for a full month. The cat formulation is distinct from the dog version and the two must never be interchanged. It is confirmed FDA-bioequivalent to Advantage Multi for Cats.

Benefits

• Prevents Heartworm Disease: Protects large cats against heartworm disease caused by Dirofilaria immitis when applied consistently once every 30 days as directed.
• Controls Flea Infestations: Kills adult fleas and treats active flea infestations in large cats, helping bring the infestation in the cat's environment under control.
• Treats Ear Mites: Treats and controls Otodectes cynotis ear mite infestations in cats as part of the monthly topical application routine.
• Treats Intestinal Worms: Treats and controls Toxocara cati roundworms and Ancylostoma tubaeforme hookworms in cats with a single monthly application.
• Advantage Multi Bioequivalent: Confirmed FDA-bioequivalent to Advantage Multi for Cats, delivering the same proven parasite protection at a more affordable price point.
• Broad Monthly Coverage: One applicator every 30 days covers five parasite categories in large cats, simplifying the monthly protection routine for pet owners.

Ingredients

Active Ingredients

Imidacloprid 80mg, Moxidectin 8mg per applicator

How to Use

Midamox Topical Solution for Cats 9.1–18 lbs is a prescription-only medication. A valid prescription from a licensed veterinarian is required to purchase this medicine.

Please follow your veterinarian's specific instructions for dosage, frequency, and administration of this medication for your cat.

Disclaimer: Dosage and administration of this medication must be determined by a licensed veterinarian. Always consult your veterinarian before administering or adjusting any prescription medication for your pet.

Additional Information

Precautions

• Apply at Base of Head Only: Apply at the base of the cat's head rather than between the shoulder blades to reduce the chance of the cat grooming and ingesting the solution.
• Prevent Licking After Application: Do not allow the cat to lick the application site for at least 30 minutes; keep cats in multi-pet households separated until the area has fully dried.
• Never Use Dog Formula on Cats: The dog formulation contains much higher moxidectin concentrations that are dangerous and potentially fatal if applied to cats.
• Avoid Use on Unwell Cats: Do not apply to cats that are sick, significantly underweight, or in poor overall condition as the risk of adverse reactions increases.
• Do Not Apply to Broken Skin: Never apply to irritated, broken, or inflamed skin at or near the intended application site on the cat.
• Minimum Age and Weight: This product is for cats and kittens nine weeks of age and older that weigh at least two pounds at the time of application.

Possible Side Effects

• Hypersalivation: Excessive drooling is the most common side effect and usually happens when a cat grooms and ingests residual solution from the application site.
• Application Site Reactions: Temporary hair loss, itching, redness, or skin lesions at the application site can occasionally occur and generally resolve on their own.
• Depression and Lethargy: Some cats may show reduced activity or temporary low mood in the days following a monthly application of this product.
• Vomiting and Reduced Appetite: Stomach upset including vomiting and decreased interest in food has been reported occasionally in cats after application.
• Serious Neurological Signs: Ataxia, trembling, hiding, or hyperactivity are rare but serious signs that need immediate emergency veterinary attention without delay.

Storage Information

• Store at Room Temperature: Keep applicators in a cool, stable spot well away from heat sources and direct light to maintain their effectiveness.
• Keep in Original Packaging: Store each applicator in its sealed foil pouch until the time of application to protect the solution from heat and light exposure.
• Keep Out of Reach: Store in a secure location that children and untreated animals in the household cannot access at any time.

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.

Shipping & Return

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

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

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

Frequently Asked Questions

Q1: What parasites does Midamox purple box protect large cats against?

Ans: Midamox for cats 9.1–18 lbs covers heartworm disease, adult fleas and flea infestations, ear mites, roundworms, and hookworms in a single monthly application. Your veterinarian will help identify which parasites pose the biggest risk based on your cat's lifestyle and location.

Q2: Is Midamox for cats the same as Advantage Multi for Cats?

Ans: Midamox is FDA-confirmed to be bioequivalent to Advantage Multi for Cats, meaning it carries the same active ingredients at identical concentrations and delivers equivalent protection. Many cat owners make the switch simply because Midamox tends to come at a friendlier price without compromising on parasite coverage.

Q3: Can the dog formula of Midamox be used on cats in an emergency?

Ans: No, never. The dog formulation of Midamox contains moxidectin at concentrations that are significantly higher than what cats can safely handle. Applying a dog formula to a cat can cause serious toxicity and can be fatal. Always use the cat-specific formulation and confirm the correct weight range with your vet.

Q4: What are the most common side effects of Midamox in large cats?

Ans: Excessive drooling is the most frequently reported side effect and usually happens when a cat licks the application site. Temporary hair loss, redness, lethargy, vomiting, and reduced appetite can also occur. Serious signs like trembling or loss of coordination are rare but need immediate veterinary attention.

Q5: Is Midamox safe for kittens and smaller cats within the 9.1–18 lb range?

Ans: Midamox is approved for use in cats and kittens nine weeks of age and older that weigh at least two pounds. The purple box is specifically sized for cats between 9.1 and 18 pounds. Your veterinarian will confirm whether this weight range and formulation is the right fit for your cat before prescribing.

Clinical Research

Heartworm Disease in Cats – American Heartworm Society

Moxidectin – ScienceDirect Topics

Imidacloprid in Cats – VCA Animal Hospitals

Fleas in Cats – MSD Veterinary Manual