Driving with certain prescription drugs in your body is illegal in England, Scotland and Wales if it impairs your driving, and could result in a hefty fine or even a driving ban. The Government states that legal drugs—prescription or over-the-counter medicines—fall under this rule. Anyone taking such medication who is unsure whether they should drive is advised to consult their doctor, pharmacist or healthcare professional.
Police checks and roadside tests
Police can stop drivers and require a 'field impairment assessment' if they suspect drug use. According to Gov.uk, this involves a series of tests, such as walking in a straight line. If illegal drugs are suspected, a roadside drug kit may screen for cannabis and cocaine.
If a driver is suspected of taking illegal drugs and deemed unfit to drive, they will be arrested and must provide a blood or urine sample at a police station. A positive test could result in criminal charges.
Drugs with specified limits
It is also an offence to drive with over the specified limits of certain drugs in your blood if they have not been prescribed. Government guidance says drivers should talk to their doctor about whether to drive if prescribed any of the following: amphetamine (e.g., dexamphetamine or selegiline), clonazepam, diazepam, flunitrazepam, lorazepam, methadone, morphine or opiate and opioid-based drugs (e.g., codeine, tramadol or fentanyl), oxazepam, and temazepam.
Driving is permitted after taking these drugs if they have been prescribed and the driver has followed a healthcare professional's advice on how to take them, or if they are not unfit to drive even when above the specified limits.
Penalties for drug driving conviction
A drug driving conviction can result in a minimum one-year driving ban, an unlimited fine, up to six months in prison and a criminal record. The driving licence will show the conviction for 11 years.
