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...
Wastewater-based epidemiology (WBE) can provide objective and timely information on the use of new psychoactive substances (NPS), originally designed as legal alternatives of internationally controlled drugs. NPS have rapidly emerged on the global drug market, posing a challenge to drug policy and constituting a risk to public health. In this study, a WBE approach was applied to monitor the use...