New Zealand Thoroughbred Racing bans the use of any substance that influences a horse’s speed, stamina or courage in racing. Drugs must not be allowed to modify the racing performance of the horse, adversely impact on its welfare or conceal genetic or acquired conditions. Prohibited substances include alkalinising agents (bicarbonates), hormones, peptides and anabolic steroids. Any confirmed detection of prohibited substances or metabolites of prohibited substances will result in the horse being disqualified from the race and, in most cases, will result in sanctions on the trainer. These sanctions are usually monetary fines, but suspensions have also been imposed in certain cases.
Therapeutic drug use
Horses are inspected pre- and post-race by Stipendiary Stewards and the race day veterinarian to ensure they are fit to race. Horses must not race under the effect of any pain killer, in an effort to prevent horses racing while injured. After any veterinary treatment, horses must have sufficient time to recuperate before competing.