Every week, the TDN posts a roundup of the relevant Horseracing Integrity and Safety Act (HISA) related rulings from around the country. Among this week's rulings, trainer Adolfo Macias has been suspended 18-months and fined $12,500 for the possession of levothyroxine, a banned substance under HISA. Levothyroxine is a synthetic thyroid hormone used to treat ailments like hypothyroidism. Due
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