10/28/2026
🐴 Let’s Talk Regu-Mate: What Every Horse Owner Should Know! 🤔
Most horse owners have heard of Regu-Mate, but if you don’t own a mare or have a mare who handles her cycles without much fuss, you may not know exactly what it does or when it might be used!
💊 What is Regu-Mate?
Regu-Mate (altrenogest) is a hormone medication commonly used to suppress estrus, or heat cycles, in mares. It’s often used in breeding programs to help manage reproductive cycles and may be prescribed for certain mares whose behavior changes during their cycles interfere with training, competition, or daily handling.
It’s important to understand that suppressing estrus does not automatically improve a horse’s athletic ability or guarantee better performance. Every horse is different, and behavior changes can have multiple underlying causes.
🐎 Does a mare have to stay on it forever?
Not necessarily! The duration of treatment depends on the individual horse and the reason it’s being used. Some situations may call for strategic, short-term use, while others require a different management plan. Reproductive function generally resumes after discontinuation, but timing can vary.
🤠 What about geldings and stallions?
Hormone-related medications may sometimes be considered when managing certain reproductive or behavioral concerns in male horses, but Regu-Mate is not a routine solution for testosterone-driven behavior in geldings or stallions. A veterinarian should evaluate the horse and determine the appropriate approach.
⚠️ Important safety reminders:
• Regu-Mate can be absorbed through the skin. Anyone handling it should wear appropriate protective gloves and avoid direct contact.
• Altrenogest can pose serious risks to pregnant women and women who may be pregnant, as well as individuals with certain reproductive health conditions. Follow the product label and your veterinarian’s handling instructions carefully.
• Competition rules matter! Organizations and individual show associations may have medication restrictions or reporting requirements. Always check the current rules for your discipline before administering any medication.
⭐️ The bottom line: Hormonal medications can be useful in the right circumstances, but they aren’t a one-size-fits-all solution. Work with your trusted veterinarian to determine whether treatment is appropriate for your horse, how long it should be used, and how to manage it safely.
