Cannabis flower with balanced THC and CBD produced less anxiety and paranoia than THC-only strains
In a naturalistic trial, cannabis flower with equal THC and CBD content produced similar positive effects but significantly less paranoia and anxiety than THC-dominant flower, with lower plasma THC levels.
Quick Facts
What This Study Found
Among 159 regular cannabis users randomly assigned to three chemovars, the THC+CBD chemovar (9% THC, 10% CBD) produced similar positive mood effects but significantly less paranoia and anxiety compared to the THC-dominant chemovar (24% THC, 1% CBD). Users of the THC+CBD flower also had lower plasma THC and higher plasma CBD concentrations.
Key Numbers
159 participants (94 male, 65 female). THC+CBD chemovar: 9% THC, 10% CBD. THC-dominant: 24% THC, 1% CBD. THC+CBD users had less paranoia and anxiety with similar positive mood effects.
How They Did This
Randomized trial with at-home administration of three cannabis flower chemovars: THC-dominant (24% THC, 1% CBD), THC+CBD (9% THC, 10% CBD), and CBD-dominant (1% THC, 23% CBD). 159 regular users assessed in a mobile pharmacology lab before, immediately after, and 1 hour after use.
Why This Research Matters
Most commercially available cannabis is THC-dominant. This study provides evidence that balanced THC:CBD products may offer the desired effects with fewer negative psychological effects.
The Bigger Picture
From a harm reduction perspective, promoting balanced THC:CBD products in legal markets could reduce negative psychological effects while maintaining the positive experiences users seek.
What This Study Doesn't Tell Us
Naturalistic at-home use means dosing was not controlled. Different THC concentrations between chemovars mean effects could be due to lower THC rather than CBD presence. Regular cannabis users may not represent occasional users.
Questions This Raises
- ?Is the reduced anxiety due to CBD's presence or simply lower THC content?
- ?Would balanced products reduce cannabis-related emergency department visits?
Trust & Context
- Key Stat:
- Balanced THC:CBD flower: same positive effects, less paranoia and anxiety
- Evidence Grade:
- Randomized design with plasma cannabinoid measurement, though naturalistic dosing and confounded THC concentrations limit conclusions.
- Study Age:
- Published in 2022.
- Original Title:
- Effects of cannabidiol in cannabis flower: Implications for harm reduction.
- Published In:
- Addiction biology, 27(1), e13092 (2022)
- Authors:
- Gibson, Laurel P(5), Karoly, Hollis C(8), Ellingson, Jarrod M(6), Klawitter, Jost, Sempio, Cristina, Squeri, Julia E, Bryan, Angela D, Bidwell, L Cinnamon, Hutchison, Kent E
- Database ID:
- RTHC-03870
Evidence Hierarchy
Participants are randomly assigned to treatment or placebo groups to test cause and effect.
What do these levels mean? →Frequently Asked Questions
Should people choose balanced THC:CBD cannabis?
This study suggests balanced products may offer similar positive effects with fewer negative psychological experiences. However, the reduced anxiety could be partly due to lower THC content rather than CBD alone.
Did CBD-dominant flower produce positive effects?
The study focused on comparing THC-dominant vs THC+CBD. The CBD-dominant chemovar (1% THC, 23% CBD) had very low THC and would not be expected to produce the same psychoactive effects.
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Cite This Study
https://rethinkthc.com/research/RTHC-03870APA
Gibson, Laurel P; Karoly, Hollis C; Ellingson, Jarrod M; Klawitter, Jost; Sempio, Cristina; Squeri, Julia E; Bryan, Angela D; Bidwell, L Cinnamon; Hutchison, Kent E. (2022). Effects of cannabidiol in cannabis flower: Implications for harm reduction.. Addiction biology, 27(1), e13092. https://doi.org/10.1111/adb.13092
MLA
Gibson, Laurel P, et al. "Effects of cannabidiol in cannabis flower: Implications for harm reduction.." Addiction biology, 2022. https://doi.org/10.1111/adb.13092
RethinkTHC
RethinkTHC Research Database. "Effects of cannabidiol in cannabis flower: Implications for ..." RTHC-03870. Retrieved from https://rethinkthc.com/research/gibson-2022-effects-of-cannabidiol-in
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.