Not Medical Advice: A urinalysis can show a positive result for K2/Spice for up to 72 hours (3 days) after its use. A saliva test can check for the K2 metabolites for up to 48 hours (2 days) after its use. This is the same for Buzz, Pot-pourri, Blaze, Red X Dawn, Smoke, K3, K9, and Genie as well, as they are all different street names for K2/Spice.
On March 1, 2011 there was a temporary nationwide ban placed on the substance, which restricted the manufacture, purchase and use of any synthetic cannabinoids. In March of 2012 this ban was extended for an additional 6 months.