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In regular users (more than once a week), the marijuana metabolite THC-COOH builds up to a high level, often on the order of hundreds of nanograms per milliliter (ng/ml), from which it may take weeks to decline back below the threshold of detection.
Peak plasma THC concentrations ranged from 46-188 ng/mL in 6 subjects after they smoked 8.8 mg THC over 10 minutes. Chronic users can have mean plasma levels of THC-COOH of 45 ng/mL, 12 hours after use; corresponding – 9 – THC levels are, however, less than 1 ng/mL.
These charts include Non-DOT testing with urine, hair and oral fluid as well as DOT regulated testing. Drug testing can detect the presence of drugs and drug metabolites by using cutoff levels to determine if a specimen tests positive or negative for use of specific types of drugs.
This chart is for general information only and is not intended to be used as medical advice. Detection times are approximate and may be influenced by a number of factors, including BMI, duration of drug use, dosage, urine concentration and interindividual metabolic differences. Please contact Cordant with specific
(a) As a laboratory, you must use the cutoff concentrations displayed in the following table for initial and confirmatory drug tests. All cutoff concentrations are expressed in nanograms per milliliter (ng/mL). The table follows:
Check out our new site: www.acllaboratories.com. Drug Classification. Street/Trade Names. Approx Window of Detection. Screen/Confirm Cutoff ng/ml.
Recognize some basic facts on how and why marijuana, or tetrahydrocannabinol, is used and abused. Identify how to determine new vs. residual use of marijuana in a patient. Describe how to calculate the carboxy-tetrahydrocannabinol (carboxy-THC) to creatinine ratio along with a decision ratio and demonstrate its clinical utility.
Use our THC detox calculator to find out how long does it take for weed to be cleared from the body, including Delta-8 THC
Significant THC concentrations (7 to 18 ng/mL) are noted following even a single puff or hit of a marijuana cigarette. Peak plasma THC concentrations ranged from 46-188 ng/mL in 6 subjects after they smoked 8.8 mg THC over 10 minutes.
Moderate Use (4 times per week) 5 days. Heavy Use (daily) 10 days. Chronic Heavy Use. 30 days. *These are approximate detection times for the drug or metabolites in urine. The actual detection time depends on dose, frequency of use, and individual metabolism.