Comparison of effects of marihuana cigarettes of three different potencies View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1982-05

AUTHORS

Mario Perez‐Reyes, Stephanie Di Guiseppi, Kenneth H Davis, Valerie H Schindler, C Edgar Cook

ABSTRACT

Marihuana cigarettes containing 1.32%, 1.97%, and 2.54% delta 9-tetrahydrocannabinol (THC) were smoked by six experienced marihuana users at weekly intervals in a double-blind cross-over design under laboratory conditions. Puff duration, number of puffs taken, duration of inhalation holding, interval between puffs, and duration of smoking were recorded for each cigarette smoked. The portion of each cigarette remaining after smoking was weighed and analyzed to determine THC content. Subjective ratings of the "high" achieved and the heart rate acceleration induced by smoking the marihuana were measured. The plasma concentrations of THC and of its principle metabolite, 11-nor-delta 9-THC-9-carboxylic acid (9-carboxy THC), were determined by radioimmunoassay of blood samples drawn at frequent intervals for 6 hr. The results indicate that, irrespective of the potency of the marihuana, the pattern of smoking was much the same. The magnitude of the subjective high, heart rate acceleration, THC, and 9-carboxy THC plasma concentrations were proportional to potency. This dose response was particularly clear between the 1.32% and the 2.54% cigarettes. Peak plasma concentrations of THC consistently occurred 7 to 8 min after initiation of smoking and declined thereafter despite continued smoking for another 6 to 10 min. Peak subjective high and peak heart rate acceleration occurred several minutes after the end of smoking and at a considerable interval after maximal THC plasma concentrations were reached. More... »

PAGES

617-624

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/clpt.1982.86

DOI

http://dx.doi.org/10.1038/clpt.1982.86

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1027819997

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/6280918


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