The public is too complacent about the risks of laughing gas, nurses are warning.
The gas – nitrous oxide – is the second most commonly used recreational drug in England and Wales after cannabis.
But the Royal College of Nurses said many people remained ignorant of the risks.
Problems can include breathing difficulties, dangerously-increased heart rate, and burns as well as death, the RCN said.
Legislation introduced in 2016 made it illegal to sell the gas for psychoactive purposes.
But enforcing the legislation has proved difficult because it is used in food products, such as whipped cream, and medicine.
Nitrous oxide – the highs and lows Effects: Feelings of euphoria and calmness, dizziness, difficulty in thinking straight and fits of