Anabolic-androgenic steroids (AAS) are drugs of abuse. They are taken in large quantities by athletes and others to increase performance, with negative health consequences. As a result, in 1991 testosterone and related AAS were declared controlled substances. However, the relative abuse and dependence liability of AAS have not been fully characterized. In humans, it is difficult to separate the direct psychoactive effects of AAS from reinforcement due to their systemic anabolic effects. However, using conditioned place preference and self-administration, studies in animals have demonstrated that AAS are reinforcing in a context where athletic performance is irrelevant. Furthermore, AAS share brain sites of action and neurotransmitter systems in common with other drugs of abuse. In particular, recent evidence links AAS with opioids. In humans, AAS abuse is associated with prescription opioid use. In animals, AAS overdose produces symptoms resembling opioid overdose, and AAS modify the activity of the endogenous opioid system.
KeywordsAnabolic agents; Testosterone; self-administration; hamsters; drug dependence
• Breakfast of champions: Recent history and prevalence of AAS useAnabolic-androgenic steroids (AAS) are a hot topic. A search of the Google news archive in March 2007 reveals 47,500 news stories on "steroids" in 2006, a 400% increase since their debut in the archive in 2002. In 2006, "steroids" even surpassed trend-setters such as "Paris Hilton" (38,500 stories) or "spinach" (42,700 stories). Current media attention on AAS abuse has been driven by accusations of steroid use among professional athletes in baseball, track, and cycling. However, public recognition of AAS use in sports dates back nearly 20 years, when Ben Johnson tested positive for stanozolol at the Seoul Olympics in 1988 [77]. Eastern Block athletes had been using steroids since the 1950's, and the International Olympic Committee banned steroid use from Olympic competition in 1976. However, the ability to reliably detect androgen metabolites in urine samples was limited until the advent of gas chromatography-mass spectroscopy [89]. Johnson's drug test spurred the United States Congress to pass the Anabolic Steroid Control Act of 1991 which declared steroids as Address all reprint requests and correspondence to Ruth I. Wood, Department of Cell and Neurobiology, Keck School of Medicine at the University of Southern California, 1333 San Pablo St., BMT 401, Los Angeles, CA 90033. Telephone (323) 442-1980, Fax: (323) 442-3466, e-mail: riw@usc.edu. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain....