
The Dangers and Legal Penalties of Drinking and Driving
It is a scientific fact that alcohol and drugs impair driving and increase your risk of crashing.
The legal alcohol limit for drivers in Northern Ireland is 35 micrograms of alcohol per 100 millilitres of breath or 80 milligrams of alcohol in 100 millilitres of blood or 107 milligrams of alcohol per 100 millilitres of urine.
Drinks
At under 1/3 of the legal limit your attention is impaired. You start to focus more on steering and miss out on other dangers like the child about to cross the road. Your alertness is impaired and the danger of sleepiness increases.
Lots of drugs can affect your ability to drive safely including some over-the-counter medicines (like cough and hay fever medicines) and many prescribed drugs. Always read the information leaflets that come with medicines carefully or ask a pharmacist or your doctor for advice.
At under 1/2 of the legal limit, you are less vigilant and your perception is starting to show
Drugs slow down your reaction time, meaning you can’t respond to emergency situations as quickly.
By 3/4 of the legal limit your perception, vision and tracking abilities are impaired, including your ability to steer within your own lane.
You are unable to judge distances and speeds properly.
By 4/5 of the legal limit, your ability to think, react and make choices are impaired.
You believe you are in control and almost invincible, so you begin to take more risks.
The combined effect is that your judgement is impaired – making you take more risks.
Your eyesight becomes more blurred and you start to lose concentration.
Drugs
Lots of drugs can affect your ability to drive safely including some over-the-counter medicines (like cough and hay fever medicines) and many prescribed drugs. Always read the information leaflets that come with medicines carefully or ask a pharmacist or your doctor for advice.
Drugs slow down your reaction time, meaning you can’t respond to emergency situations as quickly.
You are unable to judge distances and speeds properly. You believe you are in control and almost invincible, so you begin to take more risks.
Your eyesight becomes more blurred and you start to lose concentration.
Offences and Penalties
Causing death or grievous bodily injury by careless driving when under the influence of drink or drugs.
You could get:
• 14 years’ imprisonment an unlimited fine
• A ban from driving for at least two years
• An extended driving test before your licence is returned
Driving or attempting to drive when above the legal limit or unfit through drink or drugs.
You could get:
• six months’ imprisonment
• a fine of up to £5,000
• a ban from driving for at least 12 months or three years if convicted twice in 10 years
• a driving test before your licence is returned
Refusing to provide a specimen of breath, blood or urine for analysis.
You may get:
• six months’ imprisonment
• up to £5,000 fine
• a ban from driving for at least 12 months
• a driving test before your licence is returned
Being in charge of a vehicle when over the legal limit or unfit through drink/drugs.
You could get:
• three months imprisonment
• a fine of up to £2,500
• a possible ban from driving for a period decided by the District Judge
Source: New Driver NI
How CRASH Services Can Help You After A Car Crash or Accident
At CRASH Services, we specialise in helping drivers in Belfast, Newry, Derry~Londonderry and across Northern Ireland get back on the road quickly.
After an accident, our expert team will take care of:
- vehicle recovery,
- collision investigation,
- organising repairs,
- providing a replacement vehicle,
- liaising with insurance companies and
- legal and medical
And we do it all, at no cost to the not-at-fault driver.
Our service is free as we recover the costs from the third-party insurers.
Why Choose CRASH Services?
- Established in 1996
- Trusted by Hundreds of Thousands Local Northern Ireland Motorists
- No Cost to You, Costs Recovered from Insurers
- Complete Accident Management from Recovery to Repairs
- 99% Customer Recommendation Rate
Our Mission is Simple:
“To act with care for those involved in road traffic accidents.”
Need Help After an Accident in Belfast, Newry, Derry~Londonderry or anywhere across Northern Ireland?
Call us today on 028 9066 0244 or Request a Callback Today
CRASH Services, take care of everything, at no cost to you!
Frequently Asked Questions
- Is it safe to drive after drinking alcohol?
No. Alcohol affects judgement, concentration, reaction times, coordination, and vision. Even small amounts of alcohol can impair your ability to drive safely and increase the risk of a collision.
- Can I still be affected if I’m below the legal alcohol limit?
Yes. Impairment can begin before a driver reaches the legal limit. Alcohol can affect alertness, decision-making, and hazard perception even at relatively low levels.
- How does alcohol affect driving ability?
Alcohol can:
- Slow reaction times
- Reduce concentration
- Impair judgement
- Affect vision and coordination
- Increase risk-taking behaviour
- Reduce awareness of hazards
- Can drugs affect my ability to drive?
Yes. Illegal drugs, certain prescription medications, and some over-the-counter medicines can impair driving by affecting concentration, reaction times, coordination, and judgement.
- Which medicines can affect driving?
Some common medications that may cause drowsiness or impair driving include:
- Certain antihistamines
- Some cough and cold remedies
- Strong painkillers
- Sleeping tablets
- Certain antidepressants
Always read medication information carefully and seek advice if unsure.
- What should I do before driving if I’m taking medication?
Check the patient information leaflet, follow medical advice, and never drive if you’ve been told the medication may impair your ability to operate a vehicle safely.









