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18+ topic. Is it illegal to drive after using laughing gas in Denmark?

Zero limit for nitrous oxide.

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Short answer

18+ topic. From 10 November 2025 Denmark has a zero limit for driving with nitrous oxide (laughing gas) in the blood. The penalty is the same as for other drug driving: unconditional disqualification for 3 years and a fine. To get the licence back you must complete the 12-hour ANT course, which costs 3,200 kr., and pass a new theory and driving test. Police look at symptoms and behaviour, can screen your breath for the gas and then take a blood sample, which is the evidence.

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Why

  1. Zero limit since 10 November 2025.
  2. 3 years of unconditional disqualification.
  3. Blood test is the evidence.

Details

Carrying laughing gas cylinders in a car is illegal as dangerous goods transport, with a fine of 10,000 kr.

Tip

Never get into a car with a driver who has used laughing gas.

What may differ

Penalties rise if the driving causes an accident or is repeated.

Common misconception

Laughing gas leaves the body so fast that it does not count.

What actually happens

Any amount of laughing gas in the blood while driving is punished.

People also ask

  • Is it illegal to have laughing gas in Denmark?
  • How do Danish police test drivers for drugs?
  • What is the ANT course in Denmark?

Sources

This answer is for reference only. Traffic rules, fines and fees can change, so check the Danish authorities before you drive.

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