According to a study published in the Journal of Veterinary Pharmacology and Therapeutics, betamethasone, a corticosteroid, remains detectable above thresholds published by the Horseracing Integrity and Safety Authority for 23 days after administration of 12 mg IM. The study also found that IM betamethasone use suppressed the horse’s cortisol levels for 360 hours, or 15 days. … [Read more...]