Dissociative gas

Nitrous oxide addiction: signs, withdrawal & UK treatment

Name: Nitrous oxide addiction
Creator: Clearpath Editorial Team

Nitrous oxide became a Class C drug in the UK in November 2023. Heavy use — especially large canisters — causes vitamin B12 inactivation and can lead to serious, sometimes permanent, nerve damage (subacute combined degeneration of the spinal cord).

Reviewed to our medical review processWritten by Clearpath Editorial TeamMedically reviewed by Clearpath Clinical TeamLast reviewed 10 July 2026

Signs of nitrous oxide addiction

Daily use, or getting through large canisters weekly
Numbness, tingling or weakness in hands or feet
Trouble walking, or unsteady balance
Low mood, memory problems or paranoia
Continuing despite symptoms

Getting treatment

Any user with neurological symptoms needs urgent GP or A&E review, B12 blood tests, and B12 injections. Psychological treatment for the dependence is often outpatient — residential is rarely needed unless use is heavy or combined with other substances.

All UK clinics we refer to are CQC-regulated.

Nitrous oxide withdrawal timeline

Cravings and low mood

Days 1–7

Physical withdrawal is mild. Psychological cravings, low mood and irritability are the main features in the first week.

Nerve recovery

Weeks 2–12

If B12 is replaced and use stops, mild nerve symptoms often improve over weeks to months. Advanced damage may not fully reverse.

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Common questions

Is nitrous oxide addictive?▾

Psychologically yes — heavy users often struggle to stop despite obvious harm. Physical withdrawal is mild. The bigger issue is the nerve damage that develops silently before people notice.

What are the symptoms of nitrous nerve damage?▾

Numbness or tingling in the feet or hands, weakness, unsteady walking, bladder problems. These need urgent medical review and B12 injections — waiting can make damage permanent.

Is nitrous oxide illegal in the UK?▾

Yes, since November 2023. Possession for recreational use is a Class C offence. Legitimate catering and medical use continues under licence.

This page is educational. If you're currently in danger or in a medical emergency, call 999.