Every week, the TDN posts a roundup of the relevant Horseracing Integrity and Safety Act (HISA) related rulings from around the country.The following rulings were reported on HISA's “rulings” portal and through the Horseracing Integrity and Welfare Unit's (HIWU) “pending” and “resolved” cases portals.Resolved ADMC ViolationsDates: 12/23/2025 Licensee: Jesus Nunez, trainerPenalty: 7-day period of Ineligibility for Covered Person, beginning on December 24, 2025; Disqualification of Covered Horse's Race results, including forfeiture of all purses and other compensation, prizes, trophies, points, and rankings and repayment or surrender (as applicable); a fine of $1,000; imposition of 2 Penalty Points. Admission.Explainer: Medication violation for the presence of Tramadol—a class B controlled substance—in a sample taken from Crazy About You, who won at Los Alamitos on 9/27/25.Dates: 12/23/2025 Licensee: Amelia Green, trainerPenalty: Disqualification of Covered Horse's Race results, including forfeiture of all purses and other compensation, prizes, trophies, points, and rankings and repayment or surrender (as applicable); a fine of $500; imposition of 1.5 Penalty Points. Admission.Explainer: Medication violation for the presence of Betamethasone—a class C controlled substance—in a sample taken from Devilish Grin, who won at Belmont at the Big A on 10/4/25.Dates: 12/22/2025 Licensee: Howard Brown Jr., trainerPenalty: 7-day period of Ineligibility for Covered Person, beginning on December 23, 2025; Disqualification of Covered Horse's Race results, including forfeiture of all purses and other compensation, prizes, trophies, points, and rankings and repayment or surrender (as applicable); a fine of $1,000; imposition of 2 Penalty Points. Admission.Explainer: Medication violation for the presence of Tramadol—a class B controlled substance—in a sample taken from She Can Scat, who won at Parx Racing on 11/3/25.Dates: 12/22/2025 Licensee: Mario Serey Jr., trainerPenalty: Disqualification of Covered Horse's Race results, including forfeiture of all purses and other compensation, prizes, trophies, points, and rankings and repayment or surrender (as applicable); a fine of $500; imposition of 1.5 Penalty Points. Final decision of HIWU.Explainer: Medication violation for the presence of Phenylbutazone—a class C controlled substance—in a sample taken from P J's Song, who finished second at Laurel Park on 11/07/25.Dates: 12/19/2025 Licensee: Michelle Nevin, trainerPenalty: Disqualification of Covered Horse's Race results, including forfeiture of all purses and other compensation, prizes, trophies, points, and rankings and repayment or surrender (as applicable); a fine of $500; imposition of 1.5 Penalty Points. Admission.Explainer: Vets' list medication violation for the presence of Betamethasone—a class C controlled substance—in a sample taken from Meg's Foxy Grey on 11/7/25.Dates: 12/18/2025 Licensee: Sergio Barrio-Baray, trainerPenalty: A fine of $500; imposition of 1.5 Penalty Points. Final decision by HIWU.Explainer: Vets' list medication violation for the presence of Phenylbutazone—a class C controlled substance—in a sample taken from Bendettijoe on 10/29/25.Pending ADMC Violations12/23/2025, Blaine Wright, trainer: Pending medication violations for the presence of Cannabidiol (CBD)—a class B controlled substance—in samples taken from Mr. Executive, who won at Emerald Downs on 8/16/25; from Si That Tiger, who finished second in the Muckleshoot Derby Presented by 1/ST Bet Stakes at Emerald Downs on 8/17/25; and from Clovisconnection, who finished second in the Longacres Mile S. Presented by 1/ST Bet Stakes at Emerald Downs on 8/17/25.12/22/2025, Randy Lee Morse, trainer: Pending medication violation for the presence of Methocarbamol—a class C controlled substance—in a sample taken from Allequin Summer, who finished sixth at Keeneland on 10/15/25.12/19/2025, Hugo Andrade, trainer: Pending medication violation for the presence of Dexamethasone—a class C controlled substance—in a sample taken from Outkissed, who finished sixth at Mahoning Valley on 11/11/25.Violations of Crop RuleMahoning Valley:Jose Augustin Bracho – violation date December 19; $250 fine, one-day suspensionElijah Greenidge – violation date December 19; $500 fine, one-day suspensionOaklawn Park:Serafin Carmona – violation date December 20; $250 fine, one-day suspensionTurf Paradise:Glenn Corbett – violation date December 18; $250 fine, one-day suspensionThe post National Rulings, Dec. 18-Dec. 26, 2025 appeared first on TDN | Thoroughbred Daily News | Horse Racing News, Results and Video | Thoroughbred Breeding and Auctions.