Evidence map›Paper›PMID 27754480›Full record

ArticleTranslational psychiatry2016

Cannabidiol is a partial agonist at dopamine D2High receptors, predicting its antipsychotic clinical dose.

P Seeman

Open access · goldAbstract read
In one paragraph

Article in Translational psychiatry, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 1 pooled it
9.8field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

73 citing papers in PubMed, 1 synthesis or guideline pooled it, 169 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Review
  5. Review
  6. Update of the statement on safety of cannabidiol as a novel food.EFSA journal. European Food Safety Authority · 2026
    Article
  7. Article
  8. Review
  9. Review
  10. Review
  11. Utilization of Cannabidiol in Post-Organ-Transplant Care.International journal of molecular sciences · 2025
    Review
  12. Article
  13. Review
  14. Article
  15. Natural Product-Inspired Dopamine Receptor Ligands.Journal of medicinal chemistry · 2024
    Review
  16. CBD Versus CBDP: Comparing In Vitro Receptor-Binding Activities.International journal of molecular sciences · 2024
    Article
  17. State-of-the-art therapies for fragile X syndrome.Developmental medicine and child neurology · 2024
    Review
  18. Potential of CBD Acting on Cannabinoid Receptors CBInternational journal of molecular sciences · 2024
    Review
  19. Article
  20. Article

13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author at 1 institution in 1 country.

P SeemanDepartment of Psychiatry, University of Toronto, Toronto, ON, Canada.
University of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although all current antipsychotics act by interfering with the action of dopamine at dopamine D2 receptors, two recent reports showed that 800 to 1000 mg of cannabidiol per day alleviated the signs and symptoms of schizophrenia, although cannabidiol is not known to act on dopamine receptors. Because these recent clinical findings may indicate an important exception to the general rule that all antipsychotics interfere with dopamine at dopamine D2 receptors, the present study examined whether cannabidiol acted directly on D2 receptors, using tritiated domperidone to label rat brain striatal D2 receptors. It was found that cannabidiol inhibited the binding of radio-domperidone with dissociation constants of 11 nm at dopamine D2High receptors and 2800 nm at dopamine D2Low receptors, in the same biphasic manner as a dopamine partial agonist antipsychotic drug such as aripiprazole. The clinical doses of cannabidiol are sufficient to occupy the functional D2High sites. it is concluded that the dopamine partial agonist action of cannabidiol may account for its clinical antipsychotic effects.

Indexed as

Schizophrenic PsychologyAnimalsAntipsychotic AgentsBinding, CompetitiveBrainCannabidiolDomperidoneDose-Response Relationship, DrugHumansRatsRats, Sprague-DawleyReceptors, Dopamine D2SchizophreniaAntipsychotic AgentsCannabidiolDomperidoneDRD2 protein, humanReceptors, Dopamine D2

Identifiers

PMID27754480
PMCPMC5315552
OpenAlexW2533364327

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.