Marijuana (THC): No trade name
THC (tetrahydrocannabinol) is a hallucinogenic, sedative drug considered the primary active compound of the 400+ chemicals in the cannabis sativa plant. While there is some legal use of THC, such as the prescription Marinol (Dronabinol) used for wasting in cancer/HIV patients, most THC drug test positives are the result of illicit use. Marijuana is the number 1 illegal drug in the US.
Drug Class
Trade Name
No trade name
Street Names
Pot, ganga, weed, grass, mary jane, reefer, smoke, herb, and many others.
Effects Of Use
Short-term effects include memory and learning problems, distorted perception, and difficulty thinking and solving problems.
Approximate Detection Time
Urine: 1-3 days (infrequent), up to 10 days (moderate), up to 30 days (chronic)

Oral Fluid: less than 24 hours
Urine Cutoff Levels
Immunoassay (screening): 50* ng/mL

GC/MS (confirmation): 15* ng/mL
Primary Antigen
THC breaks down extensively in the body; most common metabolite is THC-COOH. This metabolite is also referred to as carboxy-THC or THCA. 11-nor-_9 THC-9 COOH
Common Cross-Reactants
Sustiva (efavirenz), an HIV treatment drug, is known to produce metabolites that cross-react on many THC assays. Also, the Micro-Distributing test is considered very sensitive to low levels in urine.

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