Steroid Side Effects | Effects of Steroids | Performance Enhancing Drugs | Steroid Information
http://www.drugfree.org/Portal/Drug_Guide/Steroids

Abusive Effects of Steroids
http://www.umes.edu/atod/abuse/drugs/steroids.htm

History of Anabolic Steroids - Steroid.com
http://www.steroid.com/history-of-anabolic-steroids.php

Anabolic steroid - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Anabolic_steroid

Many of the effects of steroids are brought about through their actions in the brain. Once steroids enter the brain, they are distributed to many regions, including the hypothalamus and limbic system. When a person takes steroids, the functioning of neurons in both of these areas is altered, resulting in a change in the types of messages that are transmitted by the neurons. Since the hypothalamus has a major role in maintaining normal hormone levels, disrupting its normal functioning also disrupts the body's hormones. This can result in many problems, including a reduction in normal testosterone production in males and loss of the monthly period in females.
http://www.nida.nih.gov/MOM/TG/momtg-steroids.html

They were developed in the 1930’s originally to build tissue and to prevent its breakdown in some debilitating diseases. They are also used to help men whose bodies can’t produce enough of the natural hormone that is needed for proper development of body hair, a lower voice, or other masculine characteristics that occur at puberty. Mostly athletes are abusing anabolic steroids. Taken in combination with a program of muscle-building exercise and diet, steroids tend to increase body weight and muscular strength. Steroids are dangerous, especially to teenagers.
http://www.geocities.com/enntf89/steroids1.htm

DEA, Drug Information, Steroids
http://www.usdoj.gov/dea/concern/steroids.html