Ballyadam Destiny tested positive for prohibited substances triamcinolone acetonide and dexamethasone after a victory at Galway.
Trainer Denis Hogan has had his licence suspended for three months and been fined €5,000 after one of his horses tested positive for a prohibited substance.
Ballyadam Destiny showed elevated levels of triamcinolone acetonide (TCA) and dexamethasone after winning at Galway last October.
Dr Lynn Hillyer, the Irish Horseracing Regulatory Board chief veterinary officer, stated in a report published on Friday that Hogan had been advised not to run his horse for 40 days after being treated by his vet, Donncha Houlihan.
Hogan accepted the findings in the report, stating he had mistaken the withdrawal period due to an administration error and has now employed additional staff as well as putting new measures in place to avoid a reoccurrence.
It is the fourth time in the previous five years a horse of Hogan's has failed a post-race drugs test – including point-to-points. His ban is due to begin on 1 August.

Kerry And Mayo Set For All-Ireland Football Final Showdown
Doyle Targets Historic Fifth Straight National 1500m Title
Celtic Reportedly Agree Record Deal For Kasper Høgh
Van Veen Advances To World Matchplay Semi-Finals
Thurles Hosts All-Ireland Camogie Semi-Final Double-Header
Power Six Under As Kim Makes PGA Tour History
Senior Hurling League Finals Take Centre Stage In Newbridge Today
Saturday Morning Sports Update