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Ponazuril for Dogs – Single-Dose Coccidia Treatment
Ponazuril is an excellent off-label anticoccidial for dogs (labeled for horses). Single-dose convenience vs Albon multi-day course.
Dose
30-50 mg/kg PO single dose
Some protocols repeat at 7 days for heavy infections.
Dose Reference Table
| Weight | Range |
|---|---|
| 5 kg | 150-250 mg |
| 10 kg | 300-500 mg |
| 20 kg | 600-1000 mg |
| 30 kg | 900-1500 mg |
Formulation
- Marquis Paste 15% (150 mg/g) – horse EPM label
- Compounded liquid ~200 mg/mL for dogs
- Baycox (toltrazuril) – similar; labeled cats/dogs in some countries
- Compounded tablets available
Ponazuril vs Albon (Sulfadimethoxine)
| Feature | Ponazuril | Albon |
|---|---|---|
| Course | Single dose | 5-10 days |
| Compliance | Excellent | Lower |
| Efficacy | Excellent | Good |
| Sulfa side effects | NO | Allergic reactions, KCS |
| Oocyst clearance | Faster | Slower |
| Cost | Compounded – moderate | Cheap |
Coccidia Species Covered
- Cystoisospora canis
- C. ohioensis
- C. burrowsi
- C. neorivolta
Puppy Coccidiosis (Common Indication)
Signs
- Diarrhea (sometimes bloody)
- Weight loss/failure to thrive
- Dehydration
- Lethargy
Diagnosis
- Fecal flotation
- Common in shelter/kennel puppies
Treatment
- Single-dose ponazuril
- Supportive care (hydration)
- Bland diet
- Probiotic
⚠ Environmental Decontamination
Coccidia oocysts are RESISTANT:
- Bleach NOT effective
- Use steam or 10% ammonia
- Clean bedding, surfaces, kennels
- Treat all household pets + new arrivals
- Outbreak control essential
Side Effects – Very Rare
- Mild GI upset (uncommon)
- Decreased appetite (rare)
- Excellent safety
- Safe young puppies (2-4 weeks)
- Wide safety margin
Frequently Asked Questions
How much ponazuril for my puppy with coccidia?
DOSE: 30-50 mg/kg PO SINGLE DOSE. EXAMPLES: 1) 2 kg puppy = 60-100 mg; 2) 5 kg = 150-250 mg; 3) 10 kg = 300-500 mg; 4) 20 kg = 600-1000 mg. COMPOUNDED LIQUID typically 200 mg/mL (from Marquis paste): 1) 2 kg = 0.3-0.5 mL; 2) 5 kg = 0.75-1.25 mL; 3) 10 kg = 1.5-2.5 mL; 4) 20 kg = 3-5 mL. Give once – some protocols repeat at 7 days for heavy infections. With or without food. Compound through veterinary pharmacy (Marquis paste off-label). Confirm coccidia diagnosis with fecal exam first. SINGLE-DOSE advantage vs Albon 5-10 days. Treat all puppies in litter + decontaminate environment (steam, 10% ammonia; bleach NOT effective).
Ponazuril vs Albon (sulfadimethoxine) for coccidia?
BOTH effective. PONAZURIL ADVANTAGES: 1) SINGLE DOSE (vs Albon 5-10 days); 2) Better compliance; 3) Better efficacy in some studies; 4) NO sulfa allergic reactions; 5) NO KCS risk (sulfa can cause); 6) Faster oocyst clearance; 7) Safe young puppies. ALBON ADVANTAGES: 1) Cheaper; 2) LABELED for dogs (Albon FDA-approved); 3) Familiar protocol; 4) Pre-mixed suspension available; 5) Easy availability. CHOOSE PONAZURIL: 1) Single-dose preferred (better compliance); 2) Sulfa-sensitive dog; 3) KCS concern; 4) Severe/heavy infection; 5) Outbreak control (single-dose easier); 6) Cost not primary concern. CHOOSE ALBON: 1) Cost-sensitive; 2) Familiar protocol; 3) Ponazuril unavailable; 4) Standard treatment OK. DOSE Albon: 50 mg/kg PO Day 1, then 25 mg/kg PO Days 2-10 (or until 2 days after diarrhea resolves). DOSE Ponazuril: 30-50 mg/kg PO single dose. Both need: 1) Confirmed coccidia diagnosis; 2) Supportive care (hydration); 3) Environmental decontamination; 4) Treat all household pets; 5) Follow-up fecal exam 2-4 weeks later.
My puppy has coccidia – what else do I need to do besides medication?
COMPREHENSIVE management essential. MEDICATION: 1) Ponazuril single dose OR Albon 5-10 days; 2) Confirm diagnosis with fecal flotation. SUPPORTIVE CARE: 1) HYDRATION – free water access; pedialyte if dehydrated; SQ fluids at vet if moderate dehydration; 2) BLAND DIET – boiled chicken + white rice 1:2; small frequent meals; 3) PROBIOTICS – FortiFlora, Proviable; 4) ANTI-DIARRHEAL adjunct (Pro-Pectalin); 5) Pumpkin for fiber. ENVIRONMENTAL DECONTAMINATION critical (coccidia oocysts resistant): 1) STEAM CLEAN bedding, surfaces, kennels; 2) 10% AMMONIA solution effective; 3) BLEACH NOT EFFECTIVE for coccidia oocysts; 4) Sunlight + drying helps; 5) Discard heavily contaminated bedding/toys; 6) Clean food/water bowls daily; 7) Remove stool promptly. HOUSEHOLD pet management: 1) TREAT ALL puppies in litter; 2) Test/treat household cats (different Cystoisospora species but cross-treatment); 3) Monitor adult dogs; 4) Quarantine sick from healthy; 5) NEW puppies test before introducing. RECHECK FECAL EXAM 2-4 weeks post-treatment. RECURRENT cases: 1) Stress-related immune dysfunction; 2) Reinfection from contaminated environment; 3) Persistent shedding; 4) Treat again + reassess environment. PREVENTION: 1) Good hygiene; 2) Prompt stool removal; 3) Avoid overcrowding; 4) Stress reduction; 5) Clean food/water; 6) Annual fecal exams; 7) Monthly preventives generally don’t cover coccidia.
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Related Articles & Guides
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References & Further Reading
The dosing ranges and safety information on this page are drawn from the following veterinary references. Always defer to your own veterinarian and the manufacturer’s label for your specific product.
- Plumb DC. Ponazuril, toltrazuril.
- Marquis Antiprotozoal Paste product information – Bayer.
- Lindsay DS et al. Treatment of coccidiosis in dogs.
- Bowman DD. Georgis’ Parasitology for Veterinarians.
- PuppaDogs. Albon Calculator, Coccidia Calculator, Puppy Diarrhea Calculator. puppadogs.com.
⚕️ Medical Disclaimer
The information on this page is intended for educational purposes only and does not replace a hands-on veterinary examination. Drug doses depend on your dog’s complete clinical picture, concurrent medications, and the exact product formulation. Always confirm dosing with your veterinarian before administering any medication, and contact a 24-hour veterinary emergency service or animal poison control immediately if you suspect a medication overdose or adverse reaction. Editorial standards: every drug dose published on PuppaDogs is cross-checked against multiple authoritative veterinary references and reviewed by PuppaDogs Veterinary Editorial Team before publication.
