"Stimulant NPS are drugs with similar effects to amphetamine, cocaine, and 3,4-methylenedioxymethamphetamine (MDMA), which result in increased alertness, energy, confidence, and sociability, and suppression of appetite and fatigue (eg, mephedrone, methylone, α-PVP).14 They are typically in a powder, capsule, tablet, liquid, or crystal form, and are primarily consumed by swallowing or snorting, as well as by injecting."
Amy Peacock, PhD, Raimondo Bruno, PhD, Natasa Gisev, PhD, Prof Louisa Degenhardt, PhD, Prof Wayne Hall, PhD, Roumen Sedefov, MD, et al. New psychoactive substances: challenges for drug surveillance, control, and public health responses. The Lancet. Volume 394, Issue 10209, p1668-1684, November 02, 2019. Published:October 23, 2019.