New NIP drug test kit THC pot marijuana x 4. "A rapid, one step test for the qulitative detection of THC metabolites in human urine . . . This assay provides only a preliminary analytical test result. A more specific alternate chemical method must be used in order to obtain a confirmed analytical 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 used."