For five years, ending in 2011, the EU research project DRUID (Driving under the influence of drugs, alcohol and medicines) investigated the prevalence of alcohol and other drugs in seriously and fatally injured and killed automobile drivers. The statistics showed clearly that drug use and driving are a dangerous combination:
The prevalence of illegal drugs varied considerably between countries. In most countries, cannabis was the most common illegal drug present in the bloodstream of both drivers killed and drivers seriously injured.
In a 2012 survey by automotive services company RAC, 12% of 17-24 year olds in the United Kingdom said they had either driven after taking drugs or been a passenger in a car driven by someone who had taken drugs.
Some prescription drugs can also impair your driving.
Tests have shown that drugs in your bloodstream seriously impair your ability to drive safely.
Laws vary from country to country. Most EU countries have a zero-tolerance approach to driving under the influence of drugs.
The punishment depends on the country, but is likely to include some or all of the following: