By: Dr. Bri Henderson, BVMS MRCVS
A list of 10 commonly used equine steroids and their uses.
If you’re going to medicate your horse, you should know what you’re giving him. Competitive equestrians in particular should be aware of which drugs are listed as banned substances or controlled medication.
Horse Medication Terms
FEI Banned Substances: Substances deemed by the FEI to have no legitimate use in the competition horse and/or have a high potential for abuse. They are not permitted for use in the competition horse at any time.
FEI Controlled Medication: Substances that are deemed by the FEI to have therapeutic value and/or be commonly used in equine medicine. Controlled Medication has the potential to affect performance and/or be a welfare risk to the horse. Some controlled medication can be given during or near a competition providing the appropriate veterinary reporting forms are used.
Horse Medication Administration
I.A. = Intra-articular injection
I.M. = Intra-muscular injection
I.V. = Intra-venous injection
10 Commonly Used Equine Steroids
Following is a list of the 10 most commonly used equine steroids, their uses and withdrawal times:
Withdrawal time: Equine Canada 48h; FEI Prohibited/Controlled substance, detection time is 48h after IV injection
2. Prednisolone – most commonly used as an oral medication for auto-immune disorders (anti-inflammatory or immunosuppressive). Used commonly to treat small airway disease or auto-immune skin conditions.
Withdrawal time: Equine Canada: 48h; FEI Prohibited/Controlled substance 3-7 days.
Withdrawal time: Equine Canada: 100mg I.A. 6 days, 200mg I.A. 14 days; FEI Prohibited/Controlled substance, detection time is 14-28 days after intra-articular injection of a 100mg into 2 joints or 200mg into 3 joints respectively.
Withdrawal time: Equine Canada: 20mg I.A. 6 days; FEI Prohibited/Controlled substance, detection time for a single joint injected is 7 days.
Withdrawal time: Equine Canada: 18mg I.A. 6 days ; FEI Prohibited/Controlled substance, detection time is 7 days.
6. Isoflupredone (Predef 2X) – Synthetic Corticosteroid. Fast/short acting. Commonly used for respiratory inflammation and skin conditions but is also used for joint inflammation and sacro-iliac injections.
Withdrawal time for respiratory and skin: Equine Canada: 48 hours after single dose I.M. Injection; FEI Prohibited/Controlled Substance, detection time for intra-articular/SI injections is 7-28 days respectively.
Withdrawal time: Equine Canada 48 h; FEI Prohibited/Controlled Substance, detection time is 14 days.
Withdrawal time: Fluticasone – Equine Canada – not listed but a general rule of 7 days applies; FEI Prohibited/Controlled substance. Budesonide is a BANNED substance under FEI.
Withdrawal time: As Naquasone is a combination of two drugs and a tradename, it is not reported on the FEI withdrawal time. While Dexamethasone has a 48hr withdrawal time, when combined with Trichlormethiazide the suggested withdrawal time is 5+ days.