Toowoomba trainer Ben Currie has been fined $6000 for presenting a horse to race with a prohibited substance in its system earlier this year.

However, stewards adjourned a second inquiry involving Currie until next week.

After an initial hearing on Wednesday, stewards charged Currie after Tints returned a positive swab to the steroid boldenone at Rockhampton on April 8.

Currie pleaded not guilty but after taking lengthy evidence stewards found otherwise and fined him $6000.

Chief steward Allan Reardon said Currie had been charged with presenting a horse with a prohibited substance which usually carried a fine.

The trainer had not been charged with the more serious administration of a steroid which could carry an automatic disqualification.

Reardon said there was no evidence to support an administration charge in Currie's case.

Stewards also took evidence involving a positive to a methamphetamine allegedly found in a swab from Party Till Dawn after she won at Toowoomba on July 16.

Reardon said that inquiry was adjourned until next Wednesday so other evidence could be presented.