Description
Why It’s Done
This test is commonly ordered to:
• Screen for marijuana use in:
o Pre-employment checks
o Workplace drug testing programs
o Legal or forensic cases (e.g., probation, custody)
• Monitor patients in substance abuse treatment programs
• Support medical evaluations in cases of altered mental status, behavioral concerns, or suspected drug use
• Comply with insurance, school, or sports-related policies
Preparation
• No special preparation is usually required.
• Avoid detox products or excessive fluid intake, as these may affect results or trigger suspicion of sample tampering.
• Inform the healthcare provider of:
o Any prescribed medications or supplements, as some may cause false positives.
o Any recent cannabis or CBD product use (including edibles, oils, or smoke exposure).
