Cat health
Best Cat Dewormers
By PawPicks Research ยท Updated
Quick answer
For the most common case owners can spot at home, rice-grain segments near the tail that mean tapeworms, Elanco Tapeworm Dewormer is the best pick: it's praziquantel, the active vets use for tapeworms, and you can buy it over the counter. But no single dewormer kills every worm, so if you haven't seen segments, a vet fecal test to identify the worm comes first. For broad-spectrum treatment or monthly prevention, Drontal and Revolution Plus are the prescription routes, both available through Chewy's pharmacy.
Here's the thing most dewormer listings won't tell you: there's no such product as a dewormer that kills all worms. Praziquantel kills tapeworms and does nothing to roundworms. Pyrantel pamoate kills roundworms and hookworms and does nothing to tapeworms. Buy the wrong one and your cat swallows a pill for nothing while the real infection carries on.
That's why the honest first step is a fecal test at your vet, usually cheap and fast, to identify which worm you're treating. The one exception is tapeworms, because they announce themselves: flat white segments that look like grains of rice around your cat's rear end or in their bedding. If you see those, an over-the-counter praziquantel product handles it without a vet visit.
The five picks below cover the real situations: a targeted tapeworm treatment, a broad-spectrum prescription pill, a topical for cats that fight pills, a roundworm liquid for kittens and multi-cat homes, and a monthly preventive so you stop treating infections and start blocking them. None of this replaces a vet if your cat is losing weight, vomiting worms, or looks unwell. And always dose by weight per the label, never by guesswork.
Our picks at a glance
| Pick | Product | Price | Best for |
|---|---|---|---|
| Best for tapeworms (OTC) | Elanco Tapeworm Dewormer (praziquantel) Tablets | typically $25 to $35 for a 3-tablet pack | Cats with visible rice-grain segments near the tail or in bedding |
| Best broad spectrum (Rx) | Elanco Drontal Broad Spectrum Dewormer Tablets | sold per tablet, often around $8 to $12 each | Confirmed mixed infections, or shelter and rescue cats with unknown history |
| Best for cats that fight pills (Rx) | Elanco Profender Topical Solution | around $25 to $40 per applicator depending on weight band | Cats that fight pills, and owners tired of losing that fight |
| Best for roundworms (OTC) | Pyrantel pamoate Oral Suspension Liquid Wormer | usually under $20 a bottle, one bottle treats several rounds | Kittens with roundworms and low-cost treatment across several cats |
| Best prevention (Rx) | Zoetis Revolution Plus Topical Solution | roughly $25 to $35 per monthly dose in 3- and 6-packs | Households that want to stop deworming reactively, especially with any flea exposure |
Elanco Tapeworm Dewormer (praziquantel) Tablets
typically $25 to $35 for a 3-tablet pack
- Active
- Praziquantel
- Kills
- Tapeworms only
- Rx needed
- No
- Form
- Tablet, can be crumbled into food
Tapeworms are the one worm you can confidently diagnose at home, and praziquantel is the same active a vet would use to treat them. Elanco's version is the established over-the-counter option: small tablets you can give whole or crumble into a strong-smelling food, dosed by weight per the label. Because fleas carry tapeworm, pairing this with flea control is what actually stops the reinfection cycle.
Pros
- The vet-standard active for tapeworms without a prescription
- Tablets crumble into wet food for cats that won't take pills
- One correctly dosed treatment usually clears the infection
Cons
- Does nothing against roundworms or hookworms
- Tapeworms come straight back if you don't also treat fleas
Best for: Cats with visible rice-grain segments near the tail or in bedding
Elanco Drontal Broad Spectrum Dewormer Tablets
sold per tablet, often around $8 to $12 each
- Actives
- Praziquantel + pyrantel pamoate
- Kills
- Tapeworms, roundworms, hookworms
- Rx needed
- Yes
- Form
- Tablet
Drontal is the closest thing to a one-pill answer because it combines the two actives that matter: praziquantel for tapeworms and pyrantel for roundworms and hookworms. It's the pill vets reach for when a fecal test shows a mixed infection, or when a cat's history makes more than one worm likely. It needs a prescription, which Chewy's pharmacy handles by contacting your vet, and the fecal test you'll get along the way is worth having anyway.
Pros
- Covers the three most common intestinal worms in one tablet
- The default vet choice for mixed or unidentified infections
- Chewy Pharmacy verifies the prescription with your vet for you
Cons
- Needs a prescription, so it's not a same-day fix
- It's a fairly large tablet, a real fight with some cats
Best for: Confirmed mixed infections, or shelter and rescue cats with unknown history
Elanco Profender Topical Solution
around $25 to $40 per applicator depending on weight band
- Actives
- Emodepside + praziquantel
- Kills
- Tapeworms, roundworms, hookworms
- Rx needed
- Yes
- Form
- Spot-on applied to the skin
Some cats simply cannot be pilled, and wrestling a dewormer into one of them twice is worse than not treating at all. Profender solves it: a single spot-on application to the back of the neck that treats tapeworms, roundworms, and hookworms through the skin. It's prescription-only and priced by weight band, but for a cat that turns pill time into a blood sport, it's the option that actually gets the treatment done.
Pros
- No pill at all, one topical application does the job
- Broad-spectrum coverage matching a combination tablet
- Applicators sized by weight band take guesswork out of dosing
Cons
- Prescription-only and pricier per treatment than tablets
- Cats can't be bathed or petted at the application spot until it dries
Best for: Cats that fight pills, and owners tired of losing that fight
Pyrantel pamoate Oral Suspension Liquid Wormer
usually under $20 a bottle, one bottle treats several rounds
- Active
- Pyrantel pamoate
- Kills
- Roundworms, hookworms
- Rx needed
- No
- Form
- Liquid, dosed by weight per the label
Pyrantel pamoate is the workhorse active for roundworms, the worm nearly every kitten picks up through their mother's milk, and a liquid is far easier to give a squirming kitten than a tablet. A single bottle covers the repeat doses roundworm treatment needs, since the drug kills adult worms but not migrating larvae, so a follow-up dose a few weeks later catches the stragglers. Dose by weight per the label, and let your vet confirm the schedule for kittens.
Pros
- The standard active for roundworms and hookworms, no prescription
- Liquid form is the easiest format for kittens and multi-cat homes
- Cheap enough to treat a whole litter without wincing
Cons
- Useless against tapeworms, the worm owners most often actually see
- Needs repeat dosing to clear an infection fully
Best for: Kittens with roundworms and low-cost treatment across several cats
Zoetis Revolution Plus Topical Solution
roughly $25 to $35 per monthly dose in 3- and 6-packs
- Actives
- Selamectin + sarolaner
- Covers
- Roundworms, hookworms, fleas, ticks, ear mites
- Rx needed
- Yes
- Form
- Monthly spot-on
Treating worms one infection at a time is the expensive way to do it. Revolution Plus is the prevention play: a monthly prescription topical that treats and controls roundworms and hookworms while also killing fleas, and fleas are how cats get tapeworms in the first place, indoors included. It doesn't kill tapeworms directly, but by breaking the flea link it removes the most common way they arrive. Order it through Chewy Pharmacy and it verifies the prescription with your vet.
Pros
- Monthly protection instead of reacting to each new infection
- Flea control cuts off the main route tapeworms use to reach your cat
- Also covers ticks, ear mites, and heartworm prevention
Cons
- Doesn't treat an existing tapeworm infection, you'd still need praziquantel
- The most expensive option here over a full year
Best for: Households that want to stop deworming reactively, especially with any flea exposure
Which worms does each cat dewormer kill
Match the active ingredient to the worm, because no active covers everything. Praziquantel (Elanco Tapeworm Dewormer, and one half of Drontal and Profender) kills tapeworms. Pyrantel pamoate (the liquid wormers, and the other half of Drontal) kills roundworms and hookworms. Emodepside (in Profender) covers roundworms and hookworms topically. Selamectin (in Revolution Plus) treats roundworms and hookworms and prevents reinfestation monthly.
This is why a fecal test earns its cost. Roundworm and hookworm eggs are invisible to you but obvious under a vet's microscope, and the test tells you exactly which active you need instead of guessing. The one shortcut: tapeworm segments are visible to the naked eye as white rice-grain pieces near the tail, so if you've seen those, you already know praziquantel is the answer. Whatever you buy, dose by weight per the label, since underdosing is the most common reason a dewormer seems to fail.
Over the counter vs prescription cat dewormers
The over-the-counter options are the single-purpose actives: praziquantel for tapeworms and pyrantel pamoate for roundworms and hookworms. Both are the same drugs a vet would use, just sold in fixed strengths for you to dose by weight per the label. If you know which worm you're treating, OTC is a perfectly good route and it's how most straightforward tapeworm cases get handled.
The broad-spectrum combinations, Drontal, Profender, and Revolution Plus, need a prescription in the US. That's less of a hurdle than it sounds: Chewy Pharmacy contacts your vet to verify the script after you order, the same way it handles flea and heartworm meds. The prescription route makes sense when the worm is unidentified, when a fecal test shows a mixed infection, or when you're moving from treatment to monthly prevention.
Signs your cat has worms and when to see a vet
The clearest sign is the one already mentioned: white segments like grains of rice around the rear end, in bedding, or in the litter box, which mean tapeworms. Roundworms show up differently, a pot-bellied look in kittens, dull coat, diarrhea, or occasionally spaghetti-like worms in vomit or stool. Hookworms are subtler and often show as weight loss or dark stools. Scooting, licking under the tail, and a ravenous appetite without weight gain round out the common signs.
Some situations skip the OTC aisle entirely. Kittens that are weak, pale-gummed, or pot-bellied need a vet, because heavy worm loads in small bodies are genuinely dangerous. The same goes for any cat losing weight, vomiting repeatedly, or passing blood. And if you've dewormed correctly and signs return within weeks, that's a reinfection source, usually fleas or hunting, that a vet can help you shut down rather than treat on repeat.
Frequently asked questions
What is the best dewormer for cats?
It depends entirely on the worm, which is why a vet fecal test comes first. For confirmed tapeworms, Elanco Tapeworm Dewormer (praziquantel) is the best over-the-counter pick. For roundworms and hookworms, a pyrantel pamoate liquid does the job cheaply. For mixed or unidentified infections, prescription Drontal covers all three, and Profender does the same as a topical for cats that fight pills.
Can I buy cat dewormer over the counter?
Yes, for the single-purpose actives. Praziquantel for tapeworms and pyrantel pamoate for roundworms and hookworms are both sold without a prescription, and they're the same drugs vets use. The broad-spectrum combinations like Drontal and Profender, plus monthly preventives like Revolution Plus, need a prescription, which Chewy Pharmacy verifies with your vet after you order.
Do I need a prescription for tapeworm dewormer for cats?
No. Praziquantel, the active that kills tapeworms, is available over the counter in products like Elanco Tapeworm Dewormer. Dose by weight per the label, and treat fleas at the same time, because flea ingestion is how cats get tapeworms and an untreated flea problem means the tapeworms come back.
How do I know which worms my cat has?
A fecal test at your vet is the reliable answer: they check a stool sample under a microscope and identify the eggs, which tells you exactly which active to buy. The one worm you can identify at home is tapeworm, which sheds flat white segments that look like grains of rice around your cat's rear end and bedding. Roundworm and hookworm eggs are microscopic, so without a test you're guessing.
How often should I deworm my cat?
There's no fixed schedule that fits every cat, so let your vet set it based on lifestyle. Outdoor cats, hunters, and cats with any flea exposure need deworming or monthly prevention far more often than a strictly indoor cat. Kittens are a special case with their own vet-guided schedule, since most are born carrying roundworms from their mother. Routine annual fecal tests catch infections you'd never spot yourself.
Do indoor cats need deworming?
Yes, though less often than outdoor cats. Fleas ride in on shoes, clothing, and other pets, and a cat that swallows an infected flea while grooming gets tapeworms without ever going outside. Potting soil, houseflies, and a rodent that finds its way in are other indoor routes. An annual fecal test is the sensible baseline, with treatment or prevention when there's any flea exposure.
Keep reading
Ready to try our top pick?
Elanco Tapeworm Dewormer (praziquantel) Tablets - cats with visible rice-grain segments near the tail or in bedding
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