Drugs

Drugs are substances which can alter people's behaviour, producing physical and psychological effects which make driving a lot more difficult.

Currently the most commonly used classification of drugs is based on the effect they have on the central nervous system.

• Stimulants like cocaine, ecstasy and amphetamines stimulate the nervous system and the brain, giving a false sense of control and reducing fatigue.
• Central nervous system depressants like opiates, liquid ecstasy and cannabis reduce the individual's ability to react.
• Hallucinogenic drugs (LSD and Ketamine) which alter the individual's perception of reality and may produce hallucinations.

Driving under the influence of any narcotic substance increases the likelihood of having an accident, as the driver's ability to react is adversely affected. This is shown by the fact that 13.5% of the drivers and pedestrians killed in traffic accidents in Catalonia in 2008 tested positive for drugs.