title: [Excretion of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid in experimental smokers. Duration of detection in urine].
abstract: Cannabis cigarettes of comparable potency were smoked by experimental smokers. Peak excretion occurs between 2 to 7 hours and falls rapidly in the first 30 hours period. Elimination then goes on slowly over 5 days. Individual and interindividual variations are observed. The test can detect occasional use of cannabis no longer than 36 h to 48 h with good probability. Negative detected user can suddenly excrete metabolites to positive levels. This has a consequence on the use of the test to screen exposed group for epidemiologic studies.
mesh_terms: D000328:Adult; D002188:Cannabis; D013759:Dronabinol / Q000031:analogs & derivatives* / Q000652:urine; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors
chemical_list: C016780:11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid; D013759:Dronabinol
vernacular_title: Excrétion de l'acide 11-nor-delta 9-tétrahydrocannabinol-9-carboxylique chez les fumeurs expérimentaux. Durée de détection dans l'urine.