New kids on the block

·Synthetic cannabinoids: These substances produce effects similar to those of THC, the principal psychoactive component in cannabis. Synthetic cannabinoids are often laced with herbal products and sold as a spice. Street names: "K2", "Kronic" and others.

·Synthetic cathinones: These are analogues/derivatives of the internationally controlled substance cathinone, one of the active components of the khat plant. They generally have a stimulant effect and include frequently reported NPS, such as mephedrone and MDPV (Methylenedioxypyrovalerone).

·Ketamine: A human and veterinary anesthetic which acts as a stimulant at low doses and a hallucinogen at high doses. It is one of the most widespread NPS in Asia.