New Drug Driving Limits

Drug driving limits and roadside testing were introduced in Scotland on Monday 21 October 2019.

This includes a zero-tolerance approach to eight drugs most associated with illegal use and also a list of other drugs associated with medical use which will have limits based on impairment and risk to road safety.

If you are taking medication in line with the prescription you have then you can claim the medical defence to the new offence.  However, you can still be prosecuted under the existing impairment offence. If your prescription indicates that you should not drive while taking the medication you are then unable to claim the medical defence.

For more information refer to