# Drontal for Cats: Dosage, Schedule, and How Often Drontal for cats dosage depends on your cat's body weight, and the tablet is given by mouth. Most veterinarians repeat the dose about 10 to 14 days later to catch newly matured worms. Drontal treats tapeworms and roundworms, but it does not treat every parasite that can infect a cat. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Drontal is a prescription dewormer that kills tapeworms and roundworms in cats, and the dose is calculated from your cat's weight by your veterinarian. - The tablet is given by mouth, with or without food, and most cats take it without problems. - A second dose is usually given about 10 to 14 days after the first to clear worms that were immature at the time of the first treatment. - Drontal for cats covers tapeworms, roundworms, and hookworms, but it does not treat whipworms, coccidia, giardia, fleas, ear mites, or heartworm, so a fecal test helps your veterinarian pick the right product. - Call your veterinarian or a pet poison control line right away if your cat vomits the dose, seems weak or wobbly, or has trouble swallowing or breathing. ## What Drontal Is and What Veterinarians Use It For Drontal is the brand name for a cat deworming tablet that combines two active drugs, praziquantel and pyrantel pamoate. Praziquantel targets tapeworms, and pyrantel pamoate targets roundworms. Your veterinarian prescribes it when a fecal test or the cat's history points to one or both of those worms. Tapeworms in cats usually come from eating infected fleas or from hunting rodents. Roundworms are common in kittens and in cats that go outdoors or live in crowded conditions. Because the two worms have different life cycles and different sources, treating one does not automatically treat the other. Drontal is not a broad parasite product. It does not kill fleas, ticks, ear mites, or mange mites. Products that combine fipronil, moxidectin, and praziquantel have shown 100% efficacy against ear mites, notoedric mange, and lice after three days of treatment [1]. That is a different drug combination with a different job, and it shows why matching the product to the parasite matters. If your cat needs other prescription medicines, it helps to understand how cat prescriptions are filled and labeled. See [Prescription Medicine For Cats](/knowledge/veterinary-medicine/clinical-methods/prescription-medicine-for-cats). ## How Drontal Works Praziquantel damages the outer covering of tapeworms so the worm loses its grip and is digested or passed in the stool. Pyrantel pamoate paralyzes roundworms by blocking their nerve signals, and the worms are then swept out of the gut. Neither drug stays in the body long enough to prevent reinfection. That is the main reason deworming is a schedule, not a one-time event. If your cat keeps hunting or keeps picking up fleas, new worms can develop after the medicine has cleared. This is also why flea control matters so much for tapeworms. If fleas are not controlled, your cat can swallow an infected flea the same week you deworm, and the cycle starts again. ## Drontal for Cats Dosage: How the Dose Is Set ### Who decides the dose Your veterinarian decides the dose. The dose is based on your cat's current weight, not on the label of an old box or on what worked for a previous cat. Kittens, pregnant cats, and cats with liver or kidney disease may need a different plan. Never split or guess a tablet dose on your own. ### How the tablet is given Give the tablet by mouth. You can hide it in a small amount of food or place it directly in the mouth and follow with a small syringe of water or a treat. Watch your cat for a few minutes to make sure the tablet goes down and stays down. If your cat vomits soon after dosing, call your veterinarian before giving another tablet. ### What to do about a missed dose If you miss the repeat dose, give it as soon as you remember, unless your veterinarian tells you otherwise. Do not double up to make up for a missed dose. If you are not sure whether your cat swallowed the first tablet, call your veterinarian instead of repeating it blindly. ### The repeat schedule Most veterinarians repeat Drontal about 10 to 14 days after the first dose. The gap exists because the first dose kills adult worms but not the immature stages that were already in the body. Those worms mature during the gap, and the second dose clears them. For kittens and for cats with heavy roundworm burdens, your veterinarian may recommend a longer schedule with several treatments. For adult cats with a single tapeworm episode and good flea control, one treatment plus a follow-up fecal test may be enough. Your cat's lifestyle, age, and test results drive the plan. ### Why there is no universal dosing chart You may see a "drontal for cats dosing chart" online, but the correct dose depends on your cat's exact weight and the product strength your veterinarian dispenses. A chart cannot account for a kitten's age, a cat's pregnancy status, or a cat that is already on other medicines. Ask your veterinarian for the dose in writing, including how many tablets and how many days apart. If your cat is also on other medications, ask about timing and interactions. Some drugs used in cats have narrow margins and need careful dosing, and therapeutic drug monitoring has shown that individual cats absorb the same drug very differently, with about 11% of measured samples falling below the target range and about 12% above it [2]. That is a reminder that one dose size does not fit every cat. ## Common and Serious Side Effects Most cats tolerate Drontal well. Mild stomach upset is the most common complaint, and it usually passes within a day. Serious reactions are uncommon but possible. | Side effect | How common or serious | What to do | |---|---|---| | Vomiting or soft stool | Common and usually mild | Withhold food for a few hours, offer water, and call your veterinarian if it lasts more than a day | | Drooling or lip smacking | Common right after dosing, mild | Offer water, watch for a few minutes, and call if it continues | | Sleepiness or poor appetite | Uncommon, usually mild | Call your veterinarian if it lasts more than 24 hours | | Weakness, wobbling, wide pupils, trouble swallowing | Uncommon but serious | Stop giving the medicine and call your veterinarian or an emergency clinic now | | Facial swelling, hives, trouble breathing | Rare but an emergency | Go to an emergency veterinary clinic immediately | Some dewormers in the same broad family as certain parasite drugs can cause neurologic signs in cats that carry a specific gene mutation. Eprinomectin, a different drug, causes neurotoxicosis at label doses in cats that lack working P-glycoprotein, with signs such as wide pupils, ataxia, generalized weakness, and glossal paresis [3]. This is not a Drontal ingredient, but it shows why you should never swap a dewormer meant for another species or another product onto your cat without veterinary guidance. If your cat needs help eating during recovery, ask your veterinarian whether a prescription appetite stimulant is appropriate. See [Mirtazapine Appetite Stimulant: Dose for Cats and Dogs Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/mirtazapine-appetite-stimulant-dose-for-cats-and-dogs-guide). ## Who Should Not Take It and Drug Interactions Drontal is not right for every cat. Tell your veterinarian if your cat is pregnant, nursing, under the age of about six weeks, or has liver or kidney disease. Tell them about every medicine, supplement, and flea product your cat receives, including products you buy without a prescription. Do not combine Drontal with another dewormer unless your veterinarian approves the plan. Giving two products that overlap can lead to an accidental double dose. This is especially true for topical products that already contain praziquantel, since praziquantel is also a Drontal ingredient. Cats that are very ill, dehydrated, or recovering from surgery may need to wait until they are stable. Your veterinarian will decide the timing. ## Overdose and When to Call for Help An overdose can cause vomiting, drooling, wobbliness, or sleepiness. If you think your cat ate extra tablets, call your veterinarian right away. If your regular clinic is closed, call an emergency veterinary hospital or a pet poison control hotline. Bring the product packaging with you or have it ready for the call. The label strength and the number of tablets swallowed help the veterinarian decide what care is needed. Do not wait for signs to appear before calling. ## Limitations and When to Contact a Veterinarian Drontal does not treat all parasites, and a negative response to treatment does not always mean the dose was wrong. Some cats have reinfection, some have a different parasite, and some have a health problem that looks like worms. Call your veterinarian the same day if your cat vomits the dose within an hour, has diarrhea that lasts more than a day, or seems more tired than usual after treatment. Go to an emergency clinic now if your cat is wobbling, cannot stand, has wide pupils with weakness, is having trouble swallowing, is breathing hard, or has swelling of the face or paws. Schedule a routine visit if your cat passes worm segments that look like rice grains, has a potbelly or dull coat, or keeps getting worms despite treatment. A fecal test can confirm what is actually there. Senior cats with repeated parasite issues may also need a broader health check, and a schedule helps. See [How Often Should My Senior Cat See the Vet? A Schedule for Healthy Aging](/knowledge/veterinary-medicine/senior-and-chronic-care/senior-cat-vet-visit-frequency). Every cat is an individual. Your veterinarian needs to examine your cat and review the history before choosing a deworming plan. ## Frequently Asked Questions ### How often should I give Drontal to my cat? Most veterinarians repeat the dose about 10 to 14 days after the first treatment. After that, the schedule depends on your cat's lifestyle, flea control, and fecal test results. Cats that hunt or go outdoors often need more frequent deworming than indoor cats. ### Can I give Drontal to a kitten? Only with a veterinarian's guidance. Kittens are dosed by weight and age, and very young kittens may need a different product or a delayed schedule. Never give a kitten an adult tablet or a dose meant for an older cat. ### Does Drontal treat fleas or ear mites? No. Drontal treats tapeworms and roundworms only. Fleas, ear mites, and mange mites need different products, and some combination products have shown complete clearance of ear mites, notoedric mange, and lice after treatment [1]. ### What if my cat vomits after taking Drontal? Call your veterinarian before giving another tablet. If the vomit happens within an hour, the dose may not have been absorbed, but repeating it without guidance can lead to too much medicine. Your veterinarian will tell you whether to redose and when. ### Can Drontal be used with other parasite preventives? Sometimes, but only with veterinary approval. Many topical products already contain praziquantel, so combining them with Drontal can double up on that drug. Tell your veterinarian every product your cat receives, including over-the-counter items, before you start treatment. ### How do I know the worms are gone? A follow-up fecal test is the most reliable way to check. You may see fewer worm segments in the stool or around the tail area, but seeing nothing does not prove the infection is cleared. Your veterinarian can retest and decide whether another treatment is needed. ### Is Drontal safe for pregnant or nursing cats? Ask your veterinarian before using it in a pregnant or nursing cat. The decision depends on the cat's health, the stage of pregnancy or nursing, and the parasite involved. Your veterinarian may choose a different product or delay treatment. ### Where can I learn more about giving medicine to my cat? Ask your veterinary team for a written dosing plan, and read up on how cat prescriptions work. See [Prescription Medicine For Cats](/knowledge/veterinary-medicine/clinical-methods/prescription-medicine-for-cats) and [How Often Should You Take Your Cat to the Vet?](/knowledge/veterinary-medicine/preventive-and-routine-care/how-often-should-you-take-your-cat-to-the-vet) for practical guidance. ## Related Articles - [Clavamox Feline Dosage & Administration Calculator: Veterinary Dosage Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/clavamox-feline-dosage-administration-calculator-veterinary-dosage-guide) - [Mirtazapine Appetite Stimulant: Dose for Cats and Dogs Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/mirtazapine-appetite-stimulant-dose-for-cats-and-dogs-guide) - [How Often Should My Senior Cat See the Vet? A Schedule for Healthy Aging](/knowledge/veterinary-medicine/senior-and-chronic-care/senior-cat-vet-visit-frequency) - [Prescription Medicine For Cats](/knowledge/veterinary-medicine/clinical-methods/prescription-medicine-for-cats) - [How Often Should You Take Your Cat to the Vet?](/knowledge/veterinary-medicine/preventive-and-routine-care/how-often-should-you-take-your-cat-to-the-vet) - [Gabapentin Dosage Calculator for Cats & Dogs: Veterinary Dosage Guide](/knowledge/veterinary-medicine/calculators-clinical-tools/gabapentin-dosage-calculator-for-cats-dogs-veterinary-dosage-guide) ## References 1. [Efficacy of a single-dose topical formulation combining Fipronil, Moxidectin and Praziquantel against natural infestations of Notoedres cati, Otodectes cynotis and Felicola subrostratus in cats](https://pubmed.ncbi.nlm.nih.gov/41983805/). Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria, 2026. 2. [Therapeutic Drug Monitoring of GS-441524 in Cats with Feline Infectious Peritonitis: Pharmacokinetic Variability and Implications for Dose Optimization](https://pubmed.ncbi.nlm.nih.gov/41901743/). Pathogens (Basel, Switzerland), 2026. 3. [Management of Eprinomectin Neurotoxicosis in Cats](https://pubmed.ncbi.nlm.nih.gov/42750103/). Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001), 2026. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)