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Temporal indication of marijuana use can be estimated from plasma and urine concentrations of delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid.
J Anal Toxicol. 2001 Oct; 25(7):538-49.JA

Abstract

Current technology establishes marijuana use based upon detection of the pharmacologically inactive cannabinoid metabolite (11-nor-delta9-carboxy-tetrahydrocannabinol-9-carboxylic acid, THC-COOH) in urine. No accurate prediction of time of use is possible because THC-COOH has a half-life of 6 days. To determine if a temporal relationship between marijuana use and metabolite excretion patterns could be established, eight healthy user-volunteers (18-35 years old) smoked marijuana cigarettes containing 0% (placebo), 1.77%, and 3.58% delta9-tetrahydrocannabinol (THC). Plasma and urine were collected prior to smoking, 5 min after smoking, and hourly thereafter for 8 h for measurement of cannabinoid concentrations by gas chromatography-mass spectrometry. Mathematical models proposed for determination of recent marijuana use were applied to data from this study and verified the temporal use of marijuana. One subject, who later admitted chronic marijuana use (urine baseline THCCOOH, 529.2 ng/mL; plasma, 75.5 ng/mL), excreted 8beta-dihydroxy-THC, peaking 2 h postsmoking (92.3 ng/mL). Urinary THC, the psychoactive component of marijuana, concentrations peaked 2 h after smoking and declined to assay limit of detection (LOD) (1.5 ng/mL) by 6 h. 11-Hydroxy-delta9-tetrahydrocannabinol (11-OH-THC) and THCCOOH were detectable for the entire 8-h testing period but continued to decrease. Urinary concentrations of THC greater than 1.5 ng/mL suggests marijuana use during the previous 8-h time period.

Authors+Show Affiliations

Department of Emergency Medicine, Louisiana State University Health Sciences Center, Shreveport 71130-3932, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

11599597

Citation

Manno, J E., et al. "Temporal Indication of Marijuana Use Can Be Estimated From Plasma and Urine Concentrations of Delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic Acid." Journal of Analytical Toxicology, vol. 25, no. 7, 2001, pp. 538-49.
Manno JE, Manno BR, Kemp PM, et al. Temporal indication of marijuana use can be estimated from plasma and urine concentrations of delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid. J Anal Toxicol. 2001;25(7):538-49.
Manno, J. E., Manno, B. R., Kemp, P. M., Alford, D. D., Abukhalaf, I. K., McWilliams, M. E., Hagaman, F. N., & Fitzgerald, M. J. (2001). Temporal indication of marijuana use can be estimated from plasma and urine concentrations of delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid. Journal of Analytical Toxicology, 25(7), 538-49.
Manno JE, et al. Temporal Indication of Marijuana Use Can Be Estimated From Plasma and Urine Concentrations of Delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic Acid. J Anal Toxicol. 2001;25(7):538-49. PubMed PMID: 11599597.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Temporal indication of marijuana use can be estimated from plasma and urine concentrations of delta9-tetrahydrocannabinol, 11-hydroxy-delta9-tetrahydrocannabinol, and 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid. AU - Manno,J E, AU - Manno,B R, AU - Kemp,P M, AU - Alford,D D, AU - Abukhalaf,I K, AU - McWilliams,M E, AU - Hagaman,F N, AU - Fitzgerald,M J, PY - 2001/10/16/pubmed PY - 2002/3/1/medline PY - 2001/10/16/entrez SP - 538 EP - 49 JF - Journal of analytical toxicology JO - J Anal Toxicol VL - 25 IS - 7 N2 - Current technology establishes marijuana use based upon detection of the pharmacologically inactive cannabinoid metabolite (11-nor-delta9-carboxy-tetrahydrocannabinol-9-carboxylic acid, THC-COOH) in urine. No accurate prediction of time of use is possible because THC-COOH has a half-life of 6 days. To determine if a temporal relationship between marijuana use and metabolite excretion patterns could be established, eight healthy user-volunteers (18-35 years old) smoked marijuana cigarettes containing 0% (placebo), 1.77%, and 3.58% delta9-tetrahydrocannabinol (THC). Plasma and urine were collected prior to smoking, 5 min after smoking, and hourly thereafter for 8 h for measurement of cannabinoid concentrations by gas chromatography-mass spectrometry. Mathematical models proposed for determination of recent marijuana use were applied to data from this study and verified the temporal use of marijuana. One subject, who later admitted chronic marijuana use (urine baseline THCCOOH, 529.2 ng/mL; plasma, 75.5 ng/mL), excreted 8beta-dihydroxy-THC, peaking 2 h postsmoking (92.3 ng/mL). Urinary THC, the psychoactive component of marijuana, concentrations peaked 2 h after smoking and declined to assay limit of detection (LOD) (1.5 ng/mL) by 6 h. 11-Hydroxy-delta9-tetrahydrocannabinol (11-OH-THC) and THCCOOH were detectable for the entire 8-h testing period but continued to decrease. Urinary concentrations of THC greater than 1.5 ng/mL suggests marijuana use during the previous 8-h time period. SN - 0146-4760 UR - https://www.unboundmedicine.com/medline/citation/11599597/Temporal_indication_of_marijuana_use_can_be_estimated_from_plasma_and_urine_concentrations_of_delta9_tetrahydrocannabinol_11_hydroxy_delta9_tetrahydrocannabinol_and_11_nor_delta9_tetrahydrocannabinol_9_carboxylic_acid_ L2 - https://academic.oup.com/jat/article-lookup/doi/10.1093/jat/25.7.538 DB - PRIME DP - Unbound Medicine ER -