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João Matias

2 papers in the library · publishing 2017-2025

Papers

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Hexahydrocannabinol (HHC) use and harms in Ireland: New findings from the 2024 European Web Survey on Drugs.

International Journal of Drug Policy November 1, 2025 Deirdre Mongan, Nicki Killeen, Seán R Millar et al.

Hexahydrocannabinol (HHC) is a semi-synthetic cannabinoid which was marketed and sold openly in Ireland as a legal alternative to cannabis products until it was controlled in July 2025. There have been reports of psychotic illness precipitated by HHC use. Consequently, there are fears that HHC may become a public health issue. This study's aim was to measure the extent of HHC use and patterns...

DOI: 10.1016/j.drugpo.2025.105011 (opens in new tab) Full text (opens in new tab) Drug harms Drug use prevalence Hexahydrocannabinol Semi-synthetic cannabinoids

Nine reasons why ecstasy is not quite what it used to be.

International Journal of Drug Policy November 20, 2017 Jane Mounteney, Paul J Griffiths, Alessandra Bo et al.

This paper explores the recent resurgence in use of ecstasy/MDMA in Europe and highlights keys areas of continuity and divergence between the ecstasy market of the 1990s and the current MDMA market. Based on a scoping study involving a targeted multi-source data collection exercise on MDMA, it highlights nine areas that have undergone some level of change, linked with both supply and demand for...