Marijuana is a Schedule I controlled substance available only on the illicit market, although it is prescribed in some states and now legal in others. Federally though, it is still an illegal substance. It is the most commonly abused illicit drug in the United States. It is a dry, shredded green and brown mix of flowers, stems, seeds, and leaves derived from the hemp plant Cannabis sativa.
The main active chemical in marijuana is THC (delta-9-tetrahydrocannabinol). The results of smoking Marijuana lead to the high that users experience, but in some cases can cause depression and anxiety.
The drug testing kits below yield a positive result when the metabolite delta-9-tetrahydrocannabinol in urine exceed 50 ng/mL. This is the suggested screening cut-off for positive specimens set by the Substance Abuse and Mental Health Services Administration (SAMHSA, USA).