Recreational use of nitrous oxide is becoming an increasing issue according to Welsh nurses who warn that "no drug is safe."
Also known as laughing gas, nitrous oxide causes short-lived feelings of euphoria and fits of giggles when inhaled.
But nurses from the Royal College of Nursing Wales say there is a lack of understanding around the abuse of nitrous oxide and its consequences on health and wellbeing.
These can include risk of fainting or suffocating from lack of oxygen.
Jeremy Davies, a mental health nurse with Betsi Cadwaladr University Health Board, has worked with users of the substance in an acute mental health setting.
Since 2016, it has been illegal to supply nitrous oxide for its psychoactive effect.
However, this is hard to enforce as the substance is easily available in small canisters intended for use in food products.
According to a government study on drug misuse, the use of nitrous oxide has remained relatively stable despite the introduction of the law.
Levels of nitrous oxide use are highest among those aged 16 to 24 years old.