It is unprofessional conduct, and is not a valid medical purpose, for a practitioner or veterinarian to prescribe, dispense, or administer an anabolic steroid, or a pharmacist to dispense an anabolic steroid, for the purpose of the hormonal manipulation that is intended to increase muscle mass, strength, or weight without a medical necessity to do so, or for the intended purpose of improving performance in any form of exercise, sport, or game.