The Drug of Abuse (MOH) Confirmatory Test is a highly accurate and specific analytical chemical test, typically using gas chromatography/mass spectrometry (GC/MS) or liquid chromatography/mass spectrometry (LC/MS/MS). It aims to confirm or rule out initial positive results from rapid screening tests by precisely identifying and quantifying the drug or its metabolites in a urine sample, adhering to strict standards to avoid false positives.