Stronghold for Cats
No Prescription Required

Stronghold for Cats is a monthly topical spot-on in which selamectin, a macrocyclic lactone, is absorbed transdermally into the bloodstream to act systemically against both external and internal parasites. Anipetshop operates under the Australian Pesticides and Veterinary Medicines Authority (APVMA), which classifies Stronghold as over-the-counter medications, making them accessible without a veterinary prescription.

Can You Buy Stronghold For Cats Without a Vet Prescription?

Yes. Stronghold for Cats is available at Anipetshop without a veterinary prescription. Anipetshop operates as a licensed online pharmacy under the Australian Pesticides and Veterinary Medicines Authority (APVMA), Australia’s federal regulatory body for veterinary medications.

Prescription requirements are determined by the regulatory classification each country’s authority assigns to a product, not by its active ingredient or formulation. In the United States, the FDA classifies selamectin-containing products, including Revolution for Cats, as prescription-only because selamectin is systemically absorbed through the skin and enters the bloodstream, placing it within the same regulatory framework as other systemic parasiticides.

The APVMA schedules the same selamectin-based formulations as over-the-counter veterinary medications, requiring no prescription to purchase or dispense. This scheduling divergence reflects a difference in regulatory policy between the two jurisdictions, not in the product itself.

Stronghold for Cats stocked at Anipetshop is sourced directly from Zoetis and contains the same selamectin concentrations as Revolution products sold in the United States. Because Anipetshop operates under APVMA regulations, these products are dispensed legally without a prescription, with active ingredient concentrations and dosing standards identical to their U.S.-labeled equivalents.

Explore the Topical Solution Formulation

Stronghold for Cats is a monthly topical spot-on in which selamectin is delivered as a colorless to pale yellow solution in an alcohol-based carrier, applied once to the skin at the base of the neck. The alcohol carrier facilitates rapid transdermal absorption; selamectin then distributes systemically through the bloodstream to reach both external and internal parasites. Pipettes are single-dose, color-coded by weight category, and housed in translucent polypropylene tubes sealed in foil packaging.

The following specifications apply to both tube strengths:

• Formulation: Selamectin in an isopropyl alcohol carrier with diisopropyl adipate as co-solvent and butylated hydroxytoluene as antioxidant stabilizer, producing a colorless to pale yellow solution.
• Physical form: Single-dose pipettes with color-coded caps: rose/pink for the 15 mg kitten strength (up to 2.5 kg) and blue for the 45 mg adult strength (2.6 to 7.5 kg).
• Storage: Store below 30°C (86°F) in the original sealed foil packaging, away from heat sources and open flame. Stronghold is highly flammable; do not expose opened pipettes to ignition sources.

The table below lists pack sizes and pricing currently available at Anipetshop:

Product	Price for 3 Doses	Price for 6 Doses	Price for 12 Doses	Pack Color
Stronghold for Puppies and Kittens up to 5 lbs (2.5 kg)	$54.50	$85.50		Mauve
Stronghold for Cats 5.1 to 15 lbs (2.6 to 7.5 kg)	$56.50	$90.50	$170.50	Blue

Take the Correct Dosage

Stronghold for Cats is dosed by body weight only. A cat’s age and breed do not determine pipette selection. Weigh your cat before ordering to confirm the correct tube strength.

The table below shows the two weight-based strengths covering kittens from 6 weeks and adult cats:

Cat’s Weight (lbs)	Cat’s Weight (kg)	Tube Strength	Cap Color
Up to 5 lbs	Up to 2.5 kg	15 mg	Rose/Pink
5.1 to 15 lbs	2.6 to 7.5 kg	45 mg	Blue

Cats near the upper boundary of a weight category should receive the next strength up rather than remain at the lower dose. Stronghold has been tested at up to 10 times the labeled dose in cats without adverse effects, so dosing at the low end of a higher weight range carries substantially less risk than underdosing, which may result in treatment failure against heartworm or fleas.

For example, a cat weighing 2.5 kg falls at the top of the kitten (rose/pink) pipette range. The correct choice is the 45 mg blue pipette rather than continuing with the 15 mg kitten strength. The labeled weight range for adult Stronghold for Cats tops out at 7.5 kg (15 lbs). For cats above this weight, the prescribing information recommends an appropriate combination of pipettes. Consult a veterinarian before dosing a cat outside the standard labeled range.

Why Cat Owners Choose Stronghold for Heartworm Prevention?

Stronghold for Cats (selamectin) addresses six parasite targets in a single monthly application: heartworm prevention, adult flea elimination, flea egg sterilization, ear mite treatment, and control of roundworms and hookworms. No other single topical product in this weight class covers this combination without requiring a separate oral or injectable treatment. The following points outline the clinical basis for each outcome.

• Heartworm and multi-parasite coverage: Selamectin circulates systemically after transdermal absorption, reaching heartworm larvae (L3 and L4 stages of Dirofilaria immitis) in the bloodstream before they mature into adult worms, while simultaneously acting on surface and gastrointestinal parasites through redistribution via sebaceous glands.
• Flea lifecycle interruption: Selamectin kills adult fleas and sterilizes flea eggs already laid on the cat and in the surrounding environment, interrupting the reproductive cycle rather than only eliminating the adults present at the time of application.
• Established safety across life stages: Stronghold is labeled for use in kittens from 6 weeks of age, as well as in breeding, pregnant, and lactating cats. Zoetis safety data indicate no adverse effects at up to 10 times the recommended dose in cats.
• Topical delivery with rapid drying: The isopropyl alcohol carrier evaporates within 30 minutes of application, leaving the active compound absorbed into the skin. The dried application site does not transfer selamectin to hands or furniture under normal contact conditions.
• Single application point: The labeled application site, the base of the neck in front of the shoulder blades, is outside a cat’s self-grooming reach, reducing the likelihood of oral ingestion after application.

How Do Pet Owners Review Non-Prescription Stronghold For Cats Online?

Pet owners purchasing Stronghold for cats through international online pharmacies consistently report two primary observations: greater efficacy against established flea infestations compared to older topical OTC products, and confidence in product authenticity when ordering from licensed suppliers. These accounts appear across forums including Reddit and reflect patterns consistent with documented pyrethroid and organophosphate resistance in flea populations across North America and the UK.

Cat owners who switched from pyrethin-based or fipronil-based OTC treatments report that Stronghold cleared active infestations where previous products had not. This outcome aligns with published resistance data: Ctenocephalides felis populations in multiple U.S. regions have demonstrated reduced susceptibility to fipronil and older OTC actives, whereas selamectin operates through a distinct mechanism (glutamate-gated chloride channel binding) to which field resistance has not been widely documented. Owners also note flea activity on treated cats ceasing within 24 to 36 hours of the first application, consistent with selamectin’s labeled onset of action.

Order Stronghold for Cats Without a Vet Prescription at Anipetshop

Stronghold for Cats is available at Anipetshop without a veterinary prescription. All Stronghold products stocked are sourced directly from Zoetis and carry the same active ingredient concentrations, manufacturing specifications, and dosing standards as Revolution products sold in the United States. The following details apply to every order fulfilled through Anipetshop:

• Manufacturer origin: Products are sourced from Zoetis-licensed manufacturing facilities and carry original brand labeling, not third-party repackaging or generic substitutes.
• Regulatory standing: Anipetshop operates as a licensed online pharmacy under APVMA regulations, which classify selamectin-based spot-ons as over-the-counter veterinary medications.
• Active ingredient equivalence: Selamectin concentration, formulation, and dosing standards in Stronghold for Cats are identical to those in Revolution for Cats sold under FDA-regulated U.S. labeling.
• Shelf life: Products are dispatched with sufficient remaining shelf life to complete a full treatment course at the time of delivery.

How Stronghold for Cats Works

Selamectin is absorbed transdermally within hours of application and reaches peak plasma concentration in cats within one to three days. From the bloodstream, it distributes along two pathways: systemic circulation, which carries it to heartworm larvae and the intestinal tract where it targets roundworms and hookworms, and selective redistribution into the sebaceous glands of the skin. The sebaceous glands act as a sustained-release depot, releasing selamectin onto hair follicles and the skin surface continuously over 30 days to maintain efficacy against fleas and ear mites.

Selamectin’s mechanism of action is binding to glutamate-gated chloride channels in the nervous system of invertebrates. This binding causes sustained chloride ion influx, which hyperpolarizes the nerve and muscle cells of the parasite, producing flaccid paralysis followed by death. Mammals, including cats and humans, do not express glutamate-gated chloride channels of the type targeted by selamectin, which accounts for the compound’s wide safety margin in non-target species.

Parasite exposure occurs through two routes: fleas and mites come into contact with selamectin on the skin and hair surface, while heartworm larvae and intestinal parasites ingest it through the bloodstream or intestinal secretions. Both routes produce the same outcome: sustained chloride influx, paralysis, and death of the target parasite.

How to Apply Stronghold to Cats

Stronghold should be applied directly to the skin at the base of the neck, in front of the shoulder blades. This site is outside a cat’s self-grooming reach, which limits the risk of oral ingestion before the product dries. Cats being treated for heartworm prevention for the first time should be confirmed heartworm-negative before starting; consult a veterinarian if heartworm status is unknown.

The following steps cover correct application:

1. Prepare the pipette: Remove from the foil packaging and hold upright. Press the cap firmly downward until the seal punctures with an audible click, then remove the cap.
2. Locate the application site: Part the fur at the base of the neck, directly in front of the shoulder blades, until a clear area of skin is visible.
3. Apply to skin, not fur: Place the pipette tip directly against the exposed skin. Squeeze the pipette three to four times to deposit the entire contents onto the skin in one spot.
4. Allow to dry: Do not massage the product in. Lift the pipette away and allow the site to air-dry. Do not touch the site or allow contact with children until fully dry, which typically takes 30 minutes to four hours.

Apply only to dry coat. Do not apply if the cat’s coat is wet, and avoid bathing the cat or allowing it to get wet for at least two hours after application. Stronghold is highly flammable; keep the cat away from open flames and heat sources for a minimum of 30 minutes post-application. Wash hands with soap and water immediately after handling the pipette. If the cat licks the wet product before it dries, temporary hypersalivation may occur due to the bitter taste of the isopropyl alcohol carrier; this is not a sign of systemic toxicity.

Are There Any Side Effects of Stronghold For Cats to Consider?

The following side effects have been reported with selamectin spot-on use in cats, organized by frequency and severity. Most reactions are localized to the application site and resolve without intervention.

Application site reactions (common):

• Temporary hair changes: Clumping, spiking, or a white powdery residue at the application site typically resolves within 24 hours as the alcohol carrier evaporates.
• Local irritation: Mild pruritus, transient erythema, or short-term alopecia at the application site have been reported. These do not indicate systemic absorption abnormality.

Gastrointestinal effects (uncommon, associated with oral ingestion):

• Hypersalivation: Occurs when a cat licks the wet product before it dries. The reaction is a response to the bitter taste of the alcohol carrier, not a sign of toxicity.
• Vomiting or reduced appetite: Infrequently reported, typically self-resolving within 24 hours.

Neurological effects (rare):

• Tremors, ataxia, or seizures: These require immediate veterinary attention. Neurological signs are more specifically associated with Stronghold Plus (selamectin plus sarolaner) due to the isoxazoline component sarolaner, rather than with standard selamectin-only Stronghold. Cats with a prior seizure history should not receive sarolaner-containing products without veterinary clearance.
• Hypersensitivity reactions: Urticaria, severe dermal inflammation, or dyspnea are rare but constitute a medical emergency. Seek veterinary attention immediately if any of these occur.

Are There Stronghold For Cats Alternatives That Don’t Require a Vet’s Prescription?

Cat owners in the United States can access selamectin-based and equivalent heartworm preventatives without a prescription through Anipetshop, an Australian-licensed online pharmacy operating under APVMA scheduling, which classifies these products as over-the-counter veterinary medications. The alternatives below each cover heartworm prevention and differ in their additional parasite targets, active ingredients, and dosing intervals.

• Revolution Plus for Cats (selamectin + sarolaner): A monthly topical that extends standard selamectin coverage to include tick control via sarolaner, an isoxazoline. Cats with a seizure history should not receive sarolaner-containing products without prior veterinary assessment.
• Bravecto Plus for Cats (fluralaner + moxidectin): A quarterly topical combining fluralaner (isoxazoline) for flea and tick control with moxidectin (macrocyclic lactone) for heartworm prevention. The 12-week dosing interval distinguishes it from monthly alternatives.
• Advocate for Cats (imidacloprid + moxidectin): A monthly topical combining imidacloprid for adult flea elimination with moxidectin for heartworm prevention and control of roundworms, hookworms, and ear mites. Advocate does not cover ticks.

AQs

What parasites does Stronghold for Cats treat?

Stronghold for Cats eliminates adult fleas, flea eggs, ear mites, biting lice, roundworms, and hookworms, and prevents heartworm disease caused by Dirofilaria immitis. It does not treat tapeworms; a separate cestocidal product is required for tapeworm control.

Is Stronghold the same as Revolution?

Yes. Both are manufactured by Zoetis and contain selamectin as the sole active ingredient at identical concentrations and formulation standards. The difference is regional branding only: Revolution is the U.S. market name, Stronghold is used in Australia, Europe, and other markets.

How quickly does Stronghold start working?

Selamectin begins killing adult fleas within 24 hours of application. Full systemic distribution, which covers heartworm larvae and intestinal parasites, is reached within one to three days as selamectin peaks in plasma.

Can I touch the application site after treatment?

Do not touch the application site until it is completely dry, which takes 30 minutes to four hours depending on coat thickness. Children should not handle treated cats during this period.

How soon can I bathe my cat after application?

Wait at least two hours before bathing or allowing the cat to get wet after applying standard Stronghold. For Stronghold Plus, the interval is 24 hours. Bathing before these intervals may reduce efficacy by washing selamectin from the skin before full absorption is complete.

What happens if my cat licks Stronghold?

Licking the wet product causes temporary hypersalivation due to the bitter taste of the isopropyl alcohol carrier. This is not a sign of systemic toxicity. If neurological signs such as tremors or ataxia appear after ingestion, seek veterinary attention immediately.

Can I use dog Stronghold on a cat?

No. Dog formulations are dosed by canine weight ranges and contain selamectin concentrations calibrated for dogs. Applying a dog-labeled product to a cat risks underdosing or overdosing. Use only the cat-specific formulation.

Is Stronghold safe for kittens?

Standard Stronghold is labeled for use in kittens from 6 weeks of age. Stronghold Plus carries a different minimum age requirement; confirm the label before use in young kittens.

Can Stronghold be used on pregnant or nursing cats?

Zoetis labels standard Stronghold as safe for use in breeding, pregnant, and lactating cats. If there is uncertainty about a specific cat’s condition, consult a veterinarian before applying.

Do I need a heartworm test before starting Stronghold?

Cats should be confirmed heartworm-negative before beginning selamectin prevention. Administering a preventative to a cat with active adult heartworm infection does not clear the existing infection and may mask the diagnosis. Consult a veterinarian for testing if your cat’s heartworm status is unknown.