Signatories to the World Anti-Doping Code include the Olympic movement and 78 international sports governing bodies. Here is a partial list of athletic events subject to the code's regulations, along with some notable exceptions.
Covered by WADA rules All Olympic events
All Paralympic events
World Cup (soccer)*
Tennis Grand Slam (Wimbledon, French Open, Australian Open, U.S. Open)
US Tennis Assn.*
Also covered are events under the jurisdictions of:
International Assn. of Athletics Federations (track & field)
International Basketball Federation
International Gymnastics Federation
International Hockey Federation
International Triathlon Union
International Swimming Federation
International Table Tennis Federation
World Taekwondo Federation
World Bridge Federation
International Chess Federation
* These are subject to their own anti-doping rules, differing in some respects from the WADA Code.
Not covered Players in the following leagues or organizations are not subject to WADA regulations unless they compete in events under WADA jurisdiction, such as the Olympics or World Cup:
National Basketball Assn.*
Major League Soccer*
National Collegiate Athletic Assn.*
Professional Golfers Assn. (PGA)
Ladies Professional Golf Assn. (LPGA)**
US Golf Assn. (US Open)
British Open (golf)
* Maintain separate anti-doping programs
** Will begin drug testing program in 2008
WHAT'S BANNED? The main categories of substances banned by WADA include these:
Anabolic agents, including steroids. Effects: Build strength, facilitate training. Examples: stanazolol, testosterone.
Hormones. Effects: Improved red blood cell count, stamina, training effectiveness. Examples: Erythropoietin (EPO), human growth hormone.
Stimulants. Effects: Combating fatigue, improving reaction time. Examples: Adrenaline, methamphetamine.
Masking agents. Effect: Concealing presence of steroids in urine. Examples: diuretics, epitestosterone.
Source: Info here