A forgetful Lisa Cropp has paid dearly for a mistake of failing to inform stewards of the prescription medicine she was taking.

Cropp tasted positive to a random swab on Oaks day during the Melbourne Cup Carnival with those results coming back to bite her this week.

Not only was she rubbed out of her four rides at Sale yesterday, she will miss five at Warrnambool today and a combined total of seven tomorrow across the Mornington and Moonee Valley meetings.

All this has come about from the drug Zopiclone, a common treatment for insomnia but one Cropp never told stewards she was taking.

It’s a big blow to the rider, especially at this time of the year and as yet there’s no certain date for the matter to be resolved.

Integrity services manager of Racing Victoria Dayle Brown says an inquiry has been opened however it was adjourned by chief steward Brett Wright at Sale and as yet there was no scheduled time for resumption.

“It will be as soon as possible,” he said.

He says had Cropp told stewards of the medication it was likely there would be no issue but it is a strict requirement that all jockeys medication is logged.

“Whether stewards will permit the substance is on a case by case basis,” he said.

Cropp will no doubt be ruing her mistake, especially given she made the two hour drive to Sale before being told of the results.

She will submit a new sample today which is expected to clear her to ride as soon as the results are known.

Those results though could take up to 14 days to come back in and will be a minimum of a week.

It was an otherwise clean carnival on the drugs front with Cropp’s case the only one to surface from the dozens of random tests made over the spring.