Molecular Mechanisms of Action of Novel Psychoactive Substances (NPS). A New Threat for Young Drug Users with Forensic-Toxicological Implications Arianna Giorgetti, Jennifer P. Pascali, Paolo Fais, Guido Pelletti, Andrea Gabbin, Giorgia Franchetti, Giovanni Cecchetto  and Guido Viel Life, 2021, 11, 440, 1-17. doi : 10.3390/life11050440   Abstract : Novel psychoactive substances (NPS) represent a severe health risk for drug users. Even though the phenomenon has been growing since the early 2000s, the mechanisms of action of NPS at the receptors and beyond them are still scarcely understood. The aim of the present study was to provide a systematic review of the updated knowledge regarding the molecular [...]