People who have been prescribed powerful anxiety or pain relief drugs are being warned about a new drug-driving law.
As well as outlawing driving while under the influence of illegal drugs, new legislation will include some prescription medicines.
But prescribed doses do not exceed the limits for legal drugs, so most patients should still be safe to drive.
Those who are unsure are advised to seek the advice of a pharmacist.
The new law, to be introduced 2 March 2015, aims to catch those who put the lives of others at risk while driving under the influence of drugs.
It sets very low levels for eight well known illegal drugs, including cannabis and cocaine, but also includes eight prescription drugs.
http://www.bbc.co.uk/news/health-31306714