A vet engaged by Wodonga trainer Brian Cox is facing charges relating to the detection of a banned substance during a stable inspection.

Dr Robert Fielding has been issued three charges by Racing Victoria stewards following the inspection of Cox's stables in March.

Last month Racing Victoria stewards issued 13 charges against Cox after finding the oral paste Nitrotain which contains ethylesstrenol, a banned anabolic androgenic steroid.

The use of anabolic androgenic steroids has been prohibited in all thoroughbreds in Australia since May 2014.

Stewards allege Fielding sold Cox 1kg of Nitrotain and recorded the sale in his day diary.

However they say Fielding issued an invoice to Cox Racing listing Pentosan 50ml & 6ml x 2 as the product of purchase when it was in fact Nitrotain 1kg.

As a result, Fielding has been charged with engaging in a dishonest or improper action or practice in connection with racing.

He has also been charged with conduct that could have led to a breach of the rules by Cox.

Stewards allege Fielding gave false evidence in an interview with stewards regarding the veterinary advice he gave Cox last December regarding the horse Cochranes Gap.

A date for the hearing has yet to be fixed.