Eur J Clin Pharmacol. 2021 Oct 18. doi: 10.1007/s00228-021-03232-8. Online ahead of print.
PURPOSE: Cannabichromene (CBC) is a phytocannabinoid commonly found in cannabis, yet its acute post-dose pharmacokinetics (PK) have not been examined in humans. This is a secondary data analysis from a trial investigating Spectrum Yellow oil, an oral cannabis product used for medical purposes that contained 20 mg cannabidiol (CBD), 0.9 mg Δ9-tetrahydrocannabinol (THC), and 1.1 mg CBC, per 1 mL of oil.
METHODS: Participants (N = 43) were randomized to one of 5 groups: 120 mg CBD, 5.4 mg THC, and 6.6 mg CBC daily; 240 mg CBD, 10.8 mg THC, and 13.2 mg CBC daily; 360 mg CBD, 16.2 mg THC, and 19.8 mg CBC daily; 480 mg CBD, 21.6 mg THC, and 26.4 mg CBC daily; or placebo. Study medication was administered every 12 h for 7 days. Plasma CBC concentrations were analyzed by a validated two-dimensional high-performance liquid chromatography-tandem mass spectrometry assay.
RESULTS: After a single dose and after the final dose, the Cmax of CBC increased by 1.3-1.8-fold for each twofold increase in dose; the tmax range was 1.6-4.3 h. Based on the ratio of administered CBD, THC, and CBC to the plasma concentration, the dose of CBD was 18 times higher than the dose of CBC, yet the AUC0-t of CBD was only 6.6-9.8-fold higher than the AUC0-t of CBC; the dose of THC was similar to the dose of CBC, yet THC was quantifiable in fewer plasma samples than was CBC.
CONCLUSIONS: CBC may have preferential absorption over CBD and THC when administered together.
TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry #ACTRN12619001450101, registered 18 October 2019.
Source: ncbi 2