Britain’s anabolic steroid scandal continued to spread April 29 when Newmarket, England, trainer Gerard Butler admitted to using steroids on his own horses, according to a report by British newspaper The Independent.

Butler has said he didn’t think the medication was a problem because he included the injections, given for injured joints, in his medical records that had been reviewed by the British Horseracing Authority (BHA).

"It did not cross my mind that there could be any problem with this medication," Butler also told The Independent. "And, judging from the fact that the BHA said nothing about it when they saw my medical book, it does not seem to have crossed their minds, either."

The medication given is known as Sungate and contains the anabolic steroid stanozolol. While Butler admits he made "a terrible mistake," he also said the he was assured by his veterinarians that the medication was widely prescribed in Newmarket and has been given to more than 100 horses stabled there