Common street names: spice, K2, Moon Rocks, Blue Lotus, many others
Active ingredients frequently change to avoid legal proscription
Generally contains<unk> receptor agonists (CB1 or CB2) that are far more potent than THC
Does not show up on routine tox screen
Generally smoked, but can be imbibed as a tea
Synthetic cannabinoids
Cocaine
Amphetamines
Benzodiazepines
Synthetic cathinones 
Ecstasy 
Ketamine
Toxic alcohols