Steroidal anti-androgen that competitively inhibits testosterone and DHT binding at androgen receptors and inhibits 5-alpha reductase. Reduces prostate size by 50–70% within 2 weeks. Also has progestogenic effects suppressing gonadotropin release.
At a glance
Class
Anti-Androgen / Progestogen
Storage
Store at room temperature below 30°C
Dosing
Licensed in EU for benign prostatic hyperplasia in intact male dogs
Frequency
q24h x 7 days per course
Feline prostatic disease is extremely rare
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
Prostate size by ultrasound at 2 and 6 monthsHepatic enzymesClinical signs (straining, hematuria)
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 Osaterone?
Osaterone is a anti-androgen / progestogen used in pets. Steroidal anti-androgen that competitively inhibits testosterone and DHT binding at androgen receptors and inhibits 5-alpha reductase. Reduces prostate size by 50–70% within 2 weeks. Also has progestogenic effects suppressing gonadotropin release.
›What is Osaterone used for in pets?
Osaterone is used in veterinary medicine for: Licensed in EU for benign prostatic hyperplasia in intact male dogs; Feline prostatic disease is extremely rare.
›What is the Osaterone dose for dogs?
For dogs, Osaterone is typically dosed as follows — Licensed in EU for benign prostatic hyperplasia in intact male dogs: 0.25–0.5 mg/kg PO q24h x 7 days per course. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›What is the Osaterone dose for cats?
For cats, Osaterone is typically dosed as follows — Feline prostatic disease is extremely rare: undefined undefined N/A N/A. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›Does Osaterone need a prescription?
Yes. Osaterone is a prescription medication and should only be administered under veterinary supervision.
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
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