Revolution Plus for Cats: Uses, Dosage & What It Covers

This information is for educational purposes only. Never give your pet any medication without your veterinarian's guidance. Dosing, frequency, and safety depend on your pet's specific health profile.

Revolution Plus is a prescription monthly topical antiparasitic made for cats and kittens 8 weeks and older that weigh at least 2.8 pounds. It combines selamectin and sarolaner, two parasite-control ingredients that work together to broaden coverage beyond older selamectin-only products.

It is applied to the skin at the base of the neck, not given by mouth. After application, the medication spreads through the skin oils and is absorbed systemically enough to help protect against several internal and external parasites. For many pet parents, that means one monthly product can cover fleas, heartworm prevention, several intestinal worms, ear mites, and certain ticks.

Because Revolution Plus contains sarolaner, an isoxazoline, your vet may be more cautious in cats with a history of tremors, seizures, or other neurologic problems. It has also not been fully evaluated for breeding, pregnant, or lactating cats, so those situations call for an individualized discussion with your vet.

Revolution Plus is labeled in the US for the prevention of heartworm disease caused by Dirofilaria immitis and for the treatment and prevention of flea infestations. It also helps prevent tapeworm infection due to Dipylidium caninum indirectly by killing the flea vector before that parasite cycle continues.

For cats, it is also used to treat and control ear mites, roundworms (Toxocara cati), and intestinal hookworms (Ancylostoma tubaeforme). In practical terms, that makes it a broad-spectrum option when your cat needs both routine prevention and treatment for common parasites found on fecal testing or ear exams.

Its tick coverage is one reason many vets choose it for cats with outdoor access, leash walks, screened porches, or homes with dogs that go outside. The label includes treatment and control of lone star ticks, Gulf Coast ticks, American dog ticks, and black-legged/deer ticks for one month. Indoor cats may still benefit too, since fleas and some parasites can hitchhike indoors on people, other pets, or shared environments.

Revolution Plus is given once every 30 days as a single topical dose chosen by your cat's body weight. The FDA-approved minimum dosage is 2.7 mg/lb (6 mg/kg) of selamectin and 0.45 mg/lb (1 mg/kg) of sarolaner. The cat product comes in three weight ranges: 2.8-5.5 lb (gold, 0.25 mL; 15 mg/2.5 mg), 5.6-11 lb (orange, 0.5 mL; 30 mg/5 mg), and 11.1-22 lb (green, 1 mL; 60 mg/10 mg). Cats over 22 pounds may need a combination of tubes as directed by your vet.

Apply the full contents directly to the skin at the base of the neck where your cat cannot easily lick it off. Do not split tubes, do not use a dog product on a cat, and do not re-dose early unless your vet specifically tells you to. If you are unsure whether the full dose reached the skin, call your vet before applying more.

For heartworm prevention, timing matters. Cats with an unknown prevention history may need heartworm testing or a tailored plan before starting. For ear mites, roundworms, and hookworms, one dose may treat the current problem, but monthly use helps control future infestations. If you miss a dose, give it when you remember and then resume monthly dosing based on your vet's guidance.

Most cats tolerate Revolution Plus well, but side effects can happen. The most commonly reported issues are application-site reactions such as temporary hair loss, redness, itching, or small skin lesions where the product was placed. Some cats also show lethargy, reduced appetite, vomiting, diarrhea, or generalized itching.

Because sarolaner is an isoxazoline, there is also a labeled warning for neurologic adverse reactions, including tremors, ataxia, and seizures. These reactions have been reported even in some cats without a prior neurologic history, though they are not common. Cats with a known seizure disorder or unexplained neurologic episodes deserve a careful risk-benefit conversation with your vet before use.

See your vet immediately if your cat has collapse, repeated vomiting, severe drooling, trouble walking, marked agitation, tremors, or a seizure after application. If your cat only has mild skin irritation or seems a little quiet for a short period, contact your vet for next steps and ask whether future dosing should stay the same or shift to another parasite-control option.

There are no labeled contraindications for Revolution Plus, but that does not mean every combination is ideal for every cat. The most important practical concern is stacking parasite preventives. Your vet may use caution if your cat is already receiving another flea, tick, mite, deworming, or heartworm product, because overlapping ingredients or overlapping effects can raise the risk of side effects.

Extra caution is also reasonable in cats taking medications that may affect the nervous system, or in cats with underlying neurologic disease, because the sarolaner component belongs to the isoxazoline class. If your cat is on seizure medication, sedatives, or other long-term prescriptions, bring a full medication list to your vet before starting or refilling Revolution Plus.

It is also smart to mention supplements, over-the-counter products, and anything applied to the skin, including shampoos, sprays, collars, and wipes. If your cat needs broad parasite coverage but also has a complex medical history, your vet can help you compare conservative, standard, and advanced prevention plans rather than assuming one product fits every situation.