"Spice" and "K2" are also commonly known as:
are usually just a mix of herbs and spices sprayed with either JWH-018 pentanoic acid or JWH-073 butanoic acid. Both of those substances are detectable in urine and blood.
Because the K2/Spice craze is relatively recent and fast-growing, not many drug test administrators test specifically for these chemicals. There are test kits available, but they are not approved for marketing to the public (test kits have to receive FDA approval before they can be sold to the public). There is at least one company providing urine sample test kits for JWH-018 pentanoic acid or JWH-073 butanoic acid to law enforcement and other authorized agencies (law enforcement agencies, prisons, sheriffs’ departments, drug courts) but are not approved to be sold to hospitals, pain clinics, rehab centers, nor employment agencies.