Like drinking and driving, it's illegal to drive if your driving has been impaired by taking drugs. With some drugs, you can even remain unfit to drive the next day.
As well as this drug-impaired-driving offence, it’s now illegal in England and Wales to drive over set levels for any of 17 named drugs (legal and illegal) in your body, whether or not you are impaired.
Very low limits have been set for some common illegal drugs such as cannabis, cocaine and MDMA.
You can get a heavy fine, be disqualified from driving or even go to prison. Check out the Think! website for more details.