The central nervous system can also be affected by anabolic-androgenic steroids. When individuals discontinue use of steroids, their size and strength diminish, often dramatically. Dependent users are usually heavy users that more than likely began taking steroids before the age of sixteen. They complete more and longer cycles of use, combine multiple anabolic steroid drugs simultaneously, and use injectable anabolic steroids. In addition, they are more likely to perceive peers as steroid users.
Dependence can occur within nine to twelve months after initial use.
Severe dependence is marked by an excess of dependency symptoms and social dysfunction. Withdrawal from anabolic-androgenic steroids can be broken down into two phases. The first phase may begin and end in the first week. It is characterized by increased pulse rate and blood pressure, chills, goose bumps, nausea, headaches, and dizziness. The individual is often anxious and irritable.