Variations of testosterone can be made in synthetic forms. The most common synthetic form of testosterone is anabolic-androgenic steroids (AAS) or anabolic steroids. The term anabolic refers to the process of building muscle. The term androgenic refers to the buildup of the sexual characteristics of a male.
Anabolic steroids are used by physicians to treat delays in puberty and diseases that cause loss of muscle mass. This drug is commonly abused for the purposes of building muscle for aesthetics or for the enhancement of athletic performance, however.
Abusers of anabolic steroids often inject the substance into the muscles; however, there are many different ways to administer this drug. Anabolic steroid abusers almost always use much larger doses than prescribed users take.
Due to the risk of adverse side effects, steroids are not prescribed on a continuous basis. Steroids are also taxing on the body’s endocrine system. When abusers take steroids on a continuous basis, the body stops reacting to the drug and fails to generate its own testosterone levels. Some abusers mix other types of steroids, drugs, and supplements with anabolic steroids to try to reverse the body’s tolerance to anabolic steroid use. This highly abusive anabolic steroid administration method is known as stacking.