Addressing the Unregulated Use of Nitrous Oxide Canisters

Dear Editor,

The increasing recreational misuse of nitrous oxide, with 7-year trends indicating a global increase in nitrous oxide use from 10 % in 2015 to 20 % in 2021, has raised significant public health concerns [1]. In the United States, < 1 % of people ages 12 years or older in the United States using inhalants at least once in the past year [2], but misuse has been steadily increasing since 2010 [3]. Further, from 2023 to 2024 in the United States, there was a 58 % increase in reports of intentional exposure to nitrous oxide [4]. Small canisters marketed under various names such as Galaxy Gas [5], which are sold with minimal regulation [5], are often used for their intoxicating effects, leading to serious health risks, including oxygen deprivation, neurological damage, and even death [1]. Considering this growing issue, there is an urgent need to reevaluate public health strategies, regulatory measures, and awareness campaigns.

The misuse of nitrous oxide (N2O), commonly known as "laughing gas," poses significant and often underestimated health risks, some of which may not be immediately apparent to users. Nitrous oxide is a potent inhalant that, when used recreationally, can cause serious physical harm. One of the most critical dangers is the displacement of oxygen in the lungs, leading to hypoxia (oxygen deprivation) [6]. Inhalation of nitrous oxide can reduce the oxygen levels available for the body, causing dizziness, loss of coordination, confusion, and, in severe cases, unconsciousness or death. The immediate effects of hypoxia are alarming, as insufficient oxygen supply to vital organs, particularly the brain, can lead to permanent neurological damage [7].

Beyond the acute risks of hypoxia, repeated or prolonged misuse of nitrous oxide can have long-term neurological consequences. One of the most concerning effects is nerve damage, which can result from a deficiency in vitamin B12. Nitrous oxide interferes with the body’s ability to absorb vitamin B12, which plays a crucial role in maintaining healthy nerve function [8]. Chronic use of nitrous oxide can exacerbate this deficiency, leading to cognitive impairments, such as memory loss, difficulty concentrating, and slowed mental processing [9]. Over time, prolonged B12 deficiency can result in irreversible brain damage, including myelopathy and peripheral neuropathy, which can severely affect a person's ability to function independently [10].

In addition to these neurological risks, nitrous oxide misuse can lead to asphyxiation, particularly when the gas is inhaled in enclosed spaces or without an adequate supply of oxygen. As the gas is inhaled, it can displace oxygen in the environment, further exacerbating the danger of hypoxic conditions. In some cases, users may experience a sudden loss of consciousness or collapse, particularly when they inhale large amounts in a short period or in environments with limited ventilation [11]. There have been numerous reported cases of hypoxic brain injury and fatalities associated with recreational nitrous oxide use, especially among young people [12], [13]. These tragic events highlight the serious risks of recreational nitrous oxide use, particularly when safety precautions, such as the presence of adequate oxygen, are not observed.

Nitrous oxide misuse is more prevalent in adolescents and young adults, particularly those aged 16–25, with prevalence rates varying by region and socioeconomic factors. In the United States, data from the Monitoring the Future Survey indicated that 2 % of high school seniors reported using inhalants in the past year [14]. This number is concerning given the widespread availability of the gas, which is commonly used in food preparation (e.g., whipped cream dispensers) and medical settings. Similar trends have been observed in Europe, particularly in the UK, where recreational nitrous oxide use is sometimes referred to as "NOSing" or "huffing." Data from the UK indicate that 3.3 % of 16–24-year-olds in the UK had used nitrous oxide recreationally, making it one of the most used inhalants among this demographic [15].

Although deaths related to nitrous oxide use are rare, they are not negligible. Reports of fatalities often involve individuals who inhaled large amounts of nitrous oxide in enclosed spaces, leading to rapid oxygen depletion. Asphyxiation and hypoxic brain injury are the primary causes of death in these instances. Between 2001 and 2020, there were 716 deaths related to nitrous oxide misuse in England and Wales, with an average of 36 deaths each year;[16] this number is likely underreported due to the nature of recreational use being largely unmonitored. These figures are a stark reminder of the dangers associated with the gas, particularly when used in environments without proper ventilation or safety precautions.

Overall, while nitrous oxide may seem like a relatively harmless substance when used recreationally, the health risks associated with its misuse are significant and should not be underestimated. The combination of hypoxia, vitamin B12 deficiency, and the potential for asphyxiation makes nitrous oxide a dangerous substance when abused, necessitating increased public awareness and regulatory oversight.

One of the primary reasons for the increase in nitrous oxide misuse is the lack of robust regulation surrounding the sale and distribution of nitrous oxide canisters. In many countries, nitrous oxide is legally available for culinary and industrial purposes, yet it is not specifically controlled as a recreational drug. The canisters, often branded as "Galaxy Gas" or similar names, are frequently sold online or in specialty stores with little to no oversight, making it easy for individuals to acquire them for non-intended uses [5]. This lack of regulation facilitates the widespread availability of the substance, despite its potential for abuse and the associated health risks.

In some regions, the sale of nitrous oxide canisters is restricted to professional or culinary purposes, such as in the food industry for whipping cream or as an oxidizer in rocket propulsion. However, loopholes in legislation and gaps in enforcement make it possible for individuals to purchase the gas without facing significant legal barriers [13]. For example, in the United States, the Federal Food, Drug, and Cosmetic Act classifies nitrous oxide as a legal substance but does not explicitly list it as a controlled substance under the Controlled Substances Act. This creates ambiguity regarding the legal status of nitrous oxide, making it difficult to regulate its sale and prevent its misuse for recreational purposes. Consequently, the availability of nitrous oxide for non-medical uses remains a significant public health concern.

A crucial component of tackling nitrous oxide misuse is stricter regulation and control over its sale and distribution. Currently, nitrous oxide is legal for industrial and culinary purposes in many countries, leading to its widespread availability [1]. In several regions, this has created a loophole that allows individuals, particularly young people, to purchase large quantities of the substance for recreational use. While some countries have enacted laws restricting the sale of nitrous oxide to minors, enforcement is often inconsistent, and the substance remains easy to acquire [3]. Recent legislation [17] has been introduced in the United States Congress to limit or even ban sales of nitrous oxide, but further regulatory actions such as age restrictions, licensing for retailers, and improved monitoring of online sales could reduce the ease with which young people access the gas.

Additionally, there is a need for comprehensive public health campaigns aimed at educating the public, especially young individuals, about the risks associated with nitrous oxide misuse [1], [6], [18]. Studies have shown that nitrous oxide can cause both short-term and long-term health issues, including hypoxia, nerve damage, and even death when used in excess [6]. These campaigns could be designed to target high-risk groups through social media, schools, and community organizations. Furthermore, implementing tracking systems that monitor the purchase and distribution of nitrous oxide could deter misuse [19].

The growing misuse of nitrous oxide presents an increasingly alarming threat to public health, with a particularly devastating impact on adolescents and young adults. As the substance becomes more easily accessible and its recreational use continues to rise, the associated risks escalate significantly. Users are not only putting themselves at risk for immediate, life-threatening consequences such as asphyxiation, but long-term abuse can also lead to severe neurological damage, cognitive impairment, and irreversible physical harm. In extreme cases, the misuse of nitrous oxide has been linked to fatal outcomes, further underscoring the urgent need for action. With the rising trend of recreational inhalant use, it is imperative that public health initiatives intensify efforts to implement comprehensive regulatory measures, widespread awareness campaigns, and robust early intervention strategies. By addressing this growing issue through education, regulation, and proactive support, we can mitigate the harmful effects and protect the well-being of vulnerable populations.