Drug driving regulations are now in force for details see below Drink driving – limits reminder. 
 
We're all aware of the drink-driving limits in the UK, but are you as clued up on the new drug-driving limits? 
Police can already prosecute motorists caught driving under the influence of drugs, including medicinal drugs. But the new rules came into force on 2nd March 2015 and introduced specified limits for 16 drugs, similar to what we have with alcohol. 
The limits for the majority of prescription drugs are above the normal doses; the new legislation will give police the power to test and arrest motorists who are suspected of driving over the new levels. 
Unlike the existing 'impairment' offence, the new law provides a medical defence if you're taking a prescription in accordance with medical instructions - provided, of course, you're not impaired. 
 
Penalties for drug-driving 
If you're convicted of drug-driving you'll get: 
 
• A minimum one-year driving ban 
• A fine up to £5,000 
• A criminal record 
 
Your driving licence will also show a conviction for drug-driving and it will stay on there for 11 years. 
 
The Government decided against a zero limit as certain medicinal drugs can be absorbed in the body and produce trace effects. They also didn't want to risk penalising drivers for accidental exposure to drugs, such as inhaling cannabis smoke in a public place. So, what's on the list? 
 
Illegal drugs 
 
1. Benzoylecgonine (cocaine) - 50 micrograms per litre of blood (µg/L) 
2. Cocaine - 10µg/L 
3. Delta-9-Tetrahydrocannabinol (cannabis and cannabinol) - 2µg/L 
4. Ketamine - 20µg/L 
5. LSD - 1µg/L 
6. Methylamphetamine - 10µg/L 
7. MDMA (ecstasy) - 10µg/L 
8. Heroin and diamorphine - 5µg/L 
 
Prescription drugs 
 
1. Clonazepam (used to treat seizures and panic disorder) - 50µg/L 
2. Diazepam (anti-anxiety) - 550µg/L 
3. Flunitrazepam (Rohypnol - sedative) - 300µg/L 
4. Lorazepam (anti-anxiety) - 100µg/L 
5. Methadone (heroin substitute) - 500µg/L 
6. Morphine (pain relief) - 80µg/L 
7. Oxazepam (anti-anxiety) - 300µg/L 
8. Temazepam (anti-anxiety and sedative) - 1,000µg/L 
 
A conviction for drug-driving also means you may not be able to get car insurance; Admiral and its sister companies will not cover anyone who has been found guilty of a drug-driving offence. 
 
If you have a driving job your employer will see the conviction on your licence and you may have trouble travelling to certain countries, such as the USA. If you drive and take prescription medicine, it may be helpful to keep evidence of this with you in case you're stopped by police 
 
Reminder on Drink Driving limits 
 
The legal drink-drive limit for the majority of the UK is 80 milligrams of alcohol per 100ml of blood - the equivalent of 800,000 micrograms per litre. In December 2014, Scotland’s drink-drive limit was lowered to 50 milligrams of alcohol per 100ml of blood; bringing them in line with most other European countries. 
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