Structural analog of thiamine (vitamin B1) that competitively inhibits thiamine uptake by coccidia, disrupting their carbohydrate metabolism and energy production. Selectively toxic to coccidia because they require exogenous thiamine.
At a glance
Class
Anticoccidial (Thiamine Analog)
Storage
Store at room temperature, protect from moisture
Dosing
Used for Isospora (Cystoisospora) coccidiosis in puppies and dogs
Off-label for feline coccidiosis
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →Safety
Fecal examination for oocysts post-treatmentNeurological signs (thiamine deficiency)Clinical improvement
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →Interactions
No documented interactions.
FAQs
Frequently asked questions
›What is Amprolium?
Amprolium is a anticoccidial (thiamine analog) used in pets. Structural analog of thiamine (vitamin B1) that competitively inhibits thiamine uptake by coccidia, disrupting their carbohydrate metabolism and energy production. Selectively toxic to coccidia because they require exogenous thiamine.
›What is Amprolium used for in pets?
Amprolium is used in veterinary medicine for: Used for Isospora (Cystoisospora) coccidiosis in puppies and dogs; Off-label for feline coccidiosis.
›What is the Amprolium dose for dogs?
For dogs, Amprolium is typically dosed as follows — Used for Isospora (Cystoisospora) coccidiosis in puppies and dogs: 110–220 mg/kg PO q24h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›What is the Amprolium dose for cats?
For cats, Amprolium is typically dosed as follows — Off-label for feline coccidiosis: 110–220 mg/kg PO q24h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›Does Amprolium need a prescription?
Amprolium is available over the counter. Even so, you should consult your veterinarian before giving any medication to your pet.
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →References
CDSCO approvals (India) — 1
Amprolium HCl IP 16.67% w/w Sulfaquinoxaline IP 16.67% w/w Powder (veterinary pr
M/s. Vibro Pharma · Approved 03.02.2017
For the treatment of Coccidiosis in poultry
Source: CDSCO Veterinary Drug Approval Registry (1969–2026)
References
The PetCare.AI drug reference is built from 13 authoritative sources cited across 580 drug monographs.
Textbooks & handbooks — 5
- Plumb's Veterinary Drug Handbook
- Withrow & MacEwen's Small Animal Clinical Oncology
- Merck Veterinary Manual
- NRC Nutrient Requirements of Dogs and Cats
- Veterinary Pharmacology and Therapeutics (Riviere & Papich)
Clinical guidelines & consensus — 4
- ASPCA Animal Poison Control Center Guidelines
- AAHA Diabetes Management Guidelines
- ASPCA Poison Control Guidelines
- RECOVER CPR Guidelines
Journals & peer-reviewed studies — 2
- EPIC Study (J Vet Intern Med 2016)
- JVIM FAT CAT Study
Regulatory & approvals — 1
- CDSCO Veterinary Drug Approval Registry (1969–2026)
Databases — 1
- Washington State University VCPL MDR1 Database