THC (Δ9 – tetrahydrocannabinol) is the primary active ingredient in cannabis (marijuana). THC is a central nervous stimulant that alters mood and sensory perceptions, produces loss of coordination, impairs short-term memory, produces symptoms of anxiety, paranoia, depression, confusion, hallucination, and increases heart rate. Large doses of marijuana could develop tolerances and physiological dependency and lead its abuse. THC has also been found to offer beneficial medical uses such as treating epilepsy and pain relief. The main metabolite excreted in the urine is 11-nor- Δ9 – tetrahydrocannabinol-9-carboxylic acid (Δ9–THC-COOH), which is found in the urine within hours of exposure and remains detectable for 3-10 days after smoking. These Identify Diagnostics drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL, which is the suggested screening cut-off for positive specimens set by the Substance Abuse and Mental Health Service Administration (SAMHSA, USA).