Anabolic steroids are used by athletes, although their use is banned in most major sports. They are performance enhancing drugs that will build up bigger muscles and give longer endurance. Anabolic steroids are illegal in horse racing, although some trainers still use these drugs on horses to make them run faster and give them more endurance on the track. These drugs can be discovered when drug testing the animal at which time they will usually be disqualified from a race. However, since not all horse racing is tightly regulated, especially in the case of harness racing, these drugs are often used before a race in an effort to get a horse to speed up. Four steroids that are used for horses that are banned are stanozolol, boldenone, nandrolene and testosterone.


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Boldenone.