
1 
These Regulations may be cited as the Drug Driving (Specified Limits) (Scotland) Regulations 2019 and come into force on 21 October 2019.
2 
The table below specifies the controlled drugs and, in each case, the limit in blood for the purposes of the offence in section 5A of the Road Traffic Act 1988 (driving or being in charge of a motor vehicle with concentration of specified controlled drug above specified limit).

Controlled drug Limit (microgrammes per litre of blood)
Amphetamine 250
Benzoylecgonine 50
Clonazepam 50
Cocaine 10
Delta-9-Tetrahydrocannabinol 2
Diazepam 550
Flunitrazepam 300
Ketamine 20
Lorazepam 100
Lysergic Acid Diethylamide 1
Methadone 500
Methylamphetamine 10
Methylenedioxymethamphetamine 10
6-Monoacetylmorphine 5
Morphine 80
Oxazepam 300
Temazepam 1000
H YOUSAF
A member of the Scottish Government
St Andrew’s House,
Edinburgh
5th March 2019