What are some of the physical side effects of performance enhancing substances?

Edited

Acute, or short term, side effects include a sudden change in physical appearance, a sudden shift in performance level (up or down), increased or flared acne on the body, nausea, tremors, cardiac arrhythmia.

Chronic, or long term, side effects include increased risk of heart attack, stroke, and seizures, weakening of the immune system, high blood pressure, cardiovascular disease, liver disease, and sexual side effects (for example, breast development in males).

As an athlete you are always responsible for what goes into your body. Never take a substance unless you are fully aware of what it contains. If you are required to take.