Two Victorian trainers charged over positive swabs will front separate Racing Appeals and Disciplinary board hearings.
Darren Weir has been issued with a charge by Racing Victoria stewards after Doing Our Best tested positive to a banned substance following its win at Ballarat in February.
Doing Our Best's sample contained traces of a diuretic.
Peter Gelagotis has also been charged after three-year-old Hvasstan returned a positive swab from his Group Two Alister Clark Stakes win in March.
Samples from Hvasstan contained ibuprofen, a non-steroidal anti-inflammatory.
Dates for the respective hearings are yet to be fixed.