Stimulants in sport
Stimulants are drugs that directly affect the central nervous system. They work to speed up parts of the brain and body, increasing the heart rate, blood pressure, metabolism and body temperature of the user. They are used by athletes to reduce tiredness and fatigue, and to increase alertness, competitiveness and aggressiveness.
The most common stimulants detected in anti-doping tests include amphetamines, cocaine, ecstasy and methylphenidate (Ritalin). The actual effects vary according to the drug and its method of ingestion鈥攄rugs that are snorted or injected will produce more immediate results than those that are taken in pill form.
Nicotine and caffeine are also frequently used as stimulants but they are not banned in sports. However, both substances are currently on the . WADA is observing them in order to detect potential patterns of misuse in sport.
The risks of using stimulants vary for each drug, but in general are high. For example, cocaine use can cause panic attacks and paranoia, lead to the loss of smell and problems swallowing, become addictive and, in rare cases, lead to heart attack. Amphetamines can cause damage to the liver, kidneys and cardiovascular system, and cause hallucinations and violent behaviour, while long term use can change the structures of the brain involved with memory and emotion.
Jamaican sprinter and track star Asafa Powell was caught using the banned stimulant oxilofrine in 2013. A number of Australian athletes have also been sanctioned for use of the stimulant methylhexanamine. Read the full for more information on Australian athletes.
The presence of stimulants in the body can be tested via a variety of procedures, with urine sampling the primary means of testing. Commonly used tests include gas chromatography-mass spectrometry, and immunologic assay.