At The Herbal empire K2,Liquid K2 is one of the various names for synthetic cannabinoids. It is made by spraying synthetic chemicals upon dried, shredded plant material. It is categorized as a designer drug since its molecular structure resembles but differs from that of cannabis (or marijuana). Some states allow it, while others do not because of the differences in its molecular structure from illegal narcotics. This suggests that it acts on the brain similarly to cannabis but with far more potency.