Praziquantel for Dogs and Cats
BVMS MRCVS
Medically reviewed by Dr. Pippa Elliott, BVMS MRCVS · Last reviewed
Drug facts
Praziquantel
Praziquantel is a broad-spectrum anti-helminthic (cestocidal) drug used in dogs and cats to treat tapeworm infections. It is often combined with other anti-parasitic agents for broader parasite control.
Treats
What is Praziquantel for Dogs and Cats
Overview
Praziquantel (PZQ) is an anti-helminthic drug used for treating cestodes (tapeworms) and schistosomes in humans and animals. It is a racemic mixture, made of two mirror-image forms (enantiomers): R-Praziquantel and S-Praziquantel. Only the R-enantiomer is responsible for the drug’s anti-parasitic activity.
PZQ is used widely in both veterinary and human medicine due to its strong effectiveness and favorable safety profile. In small animals, it eliminates tapeworm infections rapidly and is often used together with febantel, pyrantel, or oxantel for broader parasite control.
Explore more parasite-control medications in our Parasites section.
What Is Praziquantel for Dogs and Cats Used For
| Condition | Notes |
|---|---|
| Tapeworm infections (Dipylidium caninum, Taenia spp.) | Primary use in dogs and cats. |
| Echinococcus granulosus (dogs) | Effective against hydatid tapeworm species. |
| Cestode infections in cats (Toxocara cati, Taenia spp.) | Demonstrated full parasite clearance in studies. |
| Used with febantel (paste) | Achieved 100 percent efficacy in both dogs and cats. |
| Used with pyrantel/oxantel | Helps treat resistant tapeworm cases. |
How Praziquantel for Dogs and Cats Works
Praziquantel disrupts calcium ion homeostasis in susceptible parasites, causing an influx of calcium into their cells. This triggers uncontrolled muscle contraction, leading to worm paralysis and death. The parasite is then digested or expelled naturally. Recent research also identified a specific TRP ion channel (Sm.TRPMPZQ) as a likely target for PZQ activity.
Drug Facts
Praziquantel is a broad-spectrum cestocidal drug used in pets and humans. It can be administered alone or in combination with other anti-parasitic agents to broaden coverage or treat resistant infections.
Common Brands
Droncit, Drontal
Drug Class
Anti-helminthic (cestocidal)
Substance Classification
Not a controlled medication
Generic Status
Generic widely available
Availability
Prescription or OTC depending on formulation
Available forms
Praziquantel for Dogs and Cats Dosage Forms
Praziquantel is available in oral tablets, compounded liquids, paste formulations, and injectable solutions. In veterinary medicine, both single-agent Praziquantel and combination products are commonly used. Below are average U.S. price ranges.
Tablets / Chewables
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 6 tablets | $28.00 | $4.60 |
| 20 tablets | $75.00 | $3.75 |
Liquid / Compounded Suspension
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 15 mL | $25.00 | $1.66 |
| 30 mL | $40.00 | $1.33 |
| 60 mL | $70.00 | $1.16 |
Paste Formulation (with Febantel)
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| Dose per 10 kg | $8.00 | $8.00 |
| Multi-dose tube | $28.00 | $2.80 |
Injectable Form
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 10 mL | $35.00 | $3.50 |
Typical Dosing For Praziquantel for Dogs and Cats
Praziquantel dosing depends on species, formulation, and whether it is used alone or with other anti-parasitics.
Oral Dosing
| Group | Typical Dose | Notes |
|---|---|---|
| Dogs (tapeworm infections) | 5 mg/kg orally | Standard use. |
| Dogs (injectable dosing) | 5.68 mg/kg SC (0.1 mL/kg) | Achieved 100 percent efficacy. |
| Dogs using paste combo | 0.29 g/kg for 3 days | Contains febantel and Praziquantel. |
| Cats (tapeworm infections) | 5 mg/kg orally | Fully effective in studies. |
| Cats (injectable dosing) | 5.68 mg/kg SC | 100 percent parasite clearance. |
| Cats using paste combo | 0.29 g/kg for 3 days | Used in soft food. |
Risks and Warnings for Praziquantel for Dogs and Cats
Praziquantel is considered extremely safe in both dogs and cats, even at elevated doses used in difficult tapeworm infections. The document reports no observed adverse effects with standard or high dosing.
General Safety
- No clinical side effects noted with injectable or paste formulations.
- Even in resistant Dipylidium caninum cases treated with high doses or repeated courses, no side effects were reported.
- Well tolerated in all documented canine and feline studies.
Resistance Issues
- Clinical resistance reported in Dipylidium caninum (2016–2018).
- Resistant cases did not respond to 5 mg/kg, 10 mg/kg, or 20 mg/kg oral dosing.
- Successful treatments eventually used nitroscanate or pyrantel/Praziquantel/oxantel.
Parasites Not Affected
Praziquantel showed no effect against:
- Dirofilaria immitis (dogs)
- Capillaria aerophila (cats)
- Paragonimus kellicotti (cats)
Praziquantel for Dogs and Cats Warnings and Precautions
Use Praziquantel under veterinary supervision. Key precautions include:
- Do not rely on Praziquantel for parasites other than tapeworms.
- Combination therapy may be required for resistant cases.
- Always dose based on accurate body weight.
- Follow the full course when paste formulations are prescribed.
- Consult your vet before giving repeated high doses.
Disclaimer: This information is for educational purposes only and should not replace professional veterinary advice. Always consult your veterinarian before using or combining any medications for your pet.
Frequently Asked Questions (FAQ)
Frequently Asked Questions
Does Praziquantel kill all types of worms?
No. It primarily treats tapeworms. It does not treat whipworms, roundworms, or heartworms.
Is Praziquantel safe for young pets?
Yes, it is widely used in puppies and kittens under veterinary guidance.
Why is Praziquantel sometimes combined with other drugs?
Combination dewormers provide coverage against worms that Praziquantel alone cannot treat.
Can tapeworms become resistant to Praziquantel?
Yes. Some Dipylidium caninum cases in the U.S. have shown resistance.
How quickly does Praziquantel work?
It works rapidly, often clearing infections with a single dose.
Editor
The Webvet Editorial Team is the in-house group of pet-care editors and writers behind Webvet, operated by Smart Pet Collective. The team researches, writes, and maintains Webvet's pet health, behavior, and medication content. Every article follows a defined editorial process: research from reputable veterinary and scientific sources, careful drafting, mandatory review of medical content by a credentialed veterinarian, and dated publication. Health and medication articles are medically reviewed by a licensed veterinary professional before they go live and are kept current over time.
Veterinarian · BVMS MRCVS
Dr. Pippa Elliott, BVMS, MRCVS, is a veterinarian with nearly 30 years of experience in companion animal practice. Dr. Elliott earned her Bachelor of Veterinary Medicine and Surgery from the University of Glasgow. She was also designated a Member of the Royal College of Veterinary Surgeons. Married with 2 grown-up kids, Dr. Elliott has a naughty Puggle named Poggle, 3 cats and a bearded dragon.
