New psychoactive substances (NPS) identified in Canada: Results of the online NPS survey (2020–2023)
Notice bibliographique
Résumé
Purpose and Scope New psychoactive substances (NPS) are a broad class of compounds that are typically designed to mimic illicit substances and circumvent legislative controls. It is often difficult to predict their toxicity and other health effects due to a lack of research and data. In this study, NPS are defined as substances that are not controlled under the Controlled Drugs and Substances Act ( CDSA ) or otherwise regulated in Canada. Health Canada conducted the Online NPS Survey between March 2020 and March 2023 as a first step to identifying NPS used in Canada. The survey additionally aimed to characterize NPS use patterns in Canada and identify trends in the chemistry and pharmacology of reported substances. The online, self-administered questionnaire was regularly promoted on substance use discussion forums, harm reduction network sites, and social media. The questionnaire asked participants for information pertaining to an episode of NPS use in the past 12 months. Results Two hundred sixty-two (262) episodes of NPS use were reported, from which 38 unique NPS were identified. Twenty-four (24) were hallucinogens (63.2%); six were sedatives (15.8%); three were opioids (7.9%); three were stimulants (7.9%); one was a dissociative (2.6%); and one was an antidepressant (2.6%). The most common NPS chemical classes were tryptamines (34.2%), lysergamides (18.4%), and phenethylamines (7.9%) all of which belong to the hallucinogen pharmacological class. The prevalence of hallucinogens reported in the survey may be largely due to the definition of NPS used in the study, which was restricted to substances that are not regulated in Canada. The three most commonly reported NPS were 1-propionyl lysergic acid diethylamide (1P-LSD), 4-acetoxy-dimethyltryptamine (4-AcO-DMT), and 4-hydroxy-N-methyl-N-ethyl tryptamine (4-HO-MET). Polysubstance use was reported in 131 (50.0%) episodes of NPS use. Cannabis was reported as the most concurrently used substance (102 cases, 77.9%) with NPS, followed by tobacco and alcohol in 34 (26.0%) and 29 (22.1%) cases, respectively. Of the responses that reported a source for the NPS in question, the majority claimed to have purchased the NPS from an online store. Unwanted health effects were reported in over 50% of cases. Conclusions Structural trends amongst reported NPS were analysed, with a focus on hallucinogens of the tryptamine, lysergamide, and phenethylamine chemical classes. The survey provides valuable insight into NPS use and trends in Canada. More research is required to address specific concerns such as polysubstance use and health outcomes. More than half of reported episodes indicated unwanted health effects, indicating a need for further clinical research in NPS toxicology.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,002 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».