Bob Baffert, the trainer of this year’s Kentucky Derby winner Medina Spirit, announced on May 9, 2021, that the Kentucky Horse Racing Commission informed him that Medina Spirit allegedly tested positive for 21 picograms of betamethasone.

The drug, a corticosteroid, is a permissible therapeutic medication, but the Kentucky Horse Racing Commission withdrawal guidelines require intra-articular injection to be administered no closer than 14 days prior to post time of an entered race.