Marijuana (THC) Saliva Test Midstream is an immuno-chromatographic assay for the detection of Marijuana and its principal metabolites in human oral fluid at the cut-off concentration of 50 ng/mL, 40 ng/mL, 20 ng/mL or 12 ng/mL. This assay provides only a qualitative, preliminary analytical test result. A more specific analytical method must be used in order to obtain a confirmed result. Gas Chromatography/Mass spectrometry (GC/MS) is the preferred confirmatory method. Clinical consideration and professional judgment should be applied to any drug of abuse test result, particularly when preliminary positive results are indicated. For in vitro diagnostic use only. For professional use only.