New Psychoactive Substances (NPS) are synthetic or naturally derived substances that mimic the effects of controlled drugs, but due to their rapidly changing composition and legal status, they often remain outside the scope of regulatory control. Among these substances are benzodiazepines, which, while significant as a class of medications, also appear as illicit drugs in the form of new derivatives.
In this study, we examined the occurrence, use, and risks associated with benzodiazepines within the context of NPS, particularly in relation to misuse, combination with other substances, and the impact on users’ health. The main source of informations for the analysis was the European Database on New Drugs (EDND II).
We found that between 2008 and 2024, a total of 38 different benzodiazepines were newly identified in Europe. The highest number of new benzodiazepines (24) was discovered between 2014 and 2018, after which their number began to decline due to successful preventive measures. Sweden leads in the number of reported cases involving new benzodiazepines, followed by Germany and other Scandinavian countries. Despite its small population, Slovenia ranks among the leading European countries in the number of reports, as we were the first to detect three new benzodiazepines, and identified a total of 14 different ones - representing approximately 37 % of all different benzodiazepines reported in the EDND II database. Seven of these benzodiazepines are listed on Slovenian list of prohibited substances, all in Group I with a high risk of abuse and no recognized medical use, although no risk assessment has been issued for any of them.
Most of the samples were seized, predominantly in tablet and powder form. New benzodiazepines frequently appeared alongside other psychoactive substances, increasing the risk of fatal outcomes. In 2020, benzodiazepines were present in half of all drug-related deaths in Slovenia, although this proportion has declined in recent years.
Benzodiazepines represent a significant achievement in pharmacy as an effective group of medicinal compounds, but their misuse as NPS highlights the urgent need to focus on protecting individual health, as unregulated use can lead to serious mental and physical consequences, including death.
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