In today’s pearl we’ll review urine drug screens for marijuana.
Most of the metabolites of THC are excreted in feces.
THC is metabolized into 11-COOH-THC which is excreted in the urine and detected in UDS.
CBD does not metabolize to 11-COOH-THC. As a result CBD products, which generally have a very low THC:CBD ratio are not detected on UDS.
Infrequent users may have positive UDS for 3 days.
Due to the THC that is stored in the body tissues, chronic heavy users may be detectable for 30 days or longer.
A positive immunoassay does not indicate acute intoxication
References:
“Addiction Psychiatric Medicine: A comprehensive Board Review” Colon-Rivera, et.al.