Trainers Mark Kavanagh and Danny O’Brien will find out their penalties for cobalt infringements later this month.
Kavanagh, O’Brien and vet Tom Brennan have all been found guilty of charges relating to illegal levels of cobalt.
Four horses from O’Brien’s stable and one from Kavanagh’s tested above the threshold.
Brennan has admitted to adding a substance called Vitamin Complex to intravenous drips given to horses in both stables but denied knowing it contained cobalt.
The Racing Appeals and Disciplinary Board will hand down its penalties on January 19.