Evidence on the use of cannabinoids in Psychiatry and the challenges for their incorporation in Brazil
DOI:
https://doi.org/10.25118/2763-9037.2026.v16.1661Keywords:
Brazil, Mental Disorders, Cannabinoids., cannabisAbstract
Introduction: Mental disorders represent one of the leading causes of global disability and remain a critical challenge for healthcare systems. Concurrently, there is a growing public and scientific interest in the clinical use of Cannabis-based products. Objective: To synthesize the most recent international findings regarding the efficacy and safety of cannabinoid use in psychiatric conditions, as well as to discuss the scientific, regulatory, and healthcare challenges for their eventual incorporation into public and private healthcare contexts in Brazil. Method: This is a brief communication based on a synthetic review of recent international scientific literature regarding the therapeutic application of cannabinoids in mental health and the analysis of the Brazilian regulatory scenario. Results: Currently available scientific evidence remains insufficient and heterogeneous, failing to support the formal or routine indication of cannabinoids for the treatment of mental disorders. Furthermore, significant methodological gaps in existing studies are identified, alongside complex regulatory and healthcare delivery barriers to their implementation in Brazil. Conclusion: Despite the growing demand and therapeutic expectations, the use of cannabinoids in psychiatry lacks robust scientific support. The incorporation of these substances in Brazil requires the advancement of rigorous clinical research, as well as the consolidation of safe regulatory and healthcare guidelines.
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1. Arias D, Saxena S, Verguet S. Quantifying the global burden of mental disorders and their economic value. EClinicalMedicine. 2022;54:101675. https://doi.org/10.1016/j.eclinm.2022.101675 PMid:36193171 PMCid:PMC9526145
2. Wilson J, Dobson O, Langcake A, Mishra P, Bryant Z, Leung J, Dawson D, Graham M, Teesson M, Freeman TP, Hall W, Chan GCK, Stockings E. Efficacy and safety of cannabinoids for the treatment of mental disorders and substance use disorders: systematic review and meta-analysis. Lancet Psychiatry. 2026;13(4):304-15. https://doi.org/10.1016/S2215-0366(26)00015-5 PMid:41856154
3. Blessing EM, Steenkamp MM, Manzanares J, Marmar CR. Cannabidiol as a potential treatment for anxiety disorders. Neurotherapeutics. 2015;12(4):825-36. https://doi.org/10.1007/s13311-015-0387-1 PMid:26341731 PMCid:PMC4604171
4. Nishida L, Cavedini RC. Disputando as evidências, negando a pertinência: o processo para incorporação dos derivados de Cannabis no SUS. Mediações. 2023;28(3):1-18. https://doi.org/10.5433/2176-6665.2023v28n3e48571
5. Agência Nacional de Vigilância Sanitária (Brasil). Resolução da Diretoria Colegiada - RDC n. 1.015, de 2 de fevereiro de 2026. Dispõe sobre a autorização sanitária para fabricação e importação de produtos de Cannabis para uso medicinal humano e estabelece requisitos relativos à sua comercialização, e dá outras providencias [Internet]. 2026. https://anvisalegis.datalegis.net/action/ActionDatalegis.php?acao=detalharAto&cod_menu=8542&cod_modulo=310&nomeTitulo=codigos&numeroAto=00001015&orgao=RDC%2FDC%2FANVISA%2FMS&seqAto=000&tipo=RDC&valorAno=2026
6. Ried K, Tamanna T, Matthews S, Sali A. Medicinal cannabis improves sleep in adults with insomnia: a randomized double-blind placebo-controlled crossover study. J Sleep Res. 2023;32(3):e13793. https://doi.org/10.1111/jsr.13793 PMid:36539991
7. Raymundi AM, da Silva TR, Sohn JMB, Bertoglio LJ, Stern CA. Effects of Δ9 tetrahydrocannabinol on aversive memories and anxiety: review of human studies. BMC Psychiatry. 2020;20:420. https://doi.org/10.1186/s12888-020-02813-8 PMid:32842985 PMCid:PMC7448997
8. Spiga F, Parkhouse T, Tang VM, Savović J, Le Foll B, Nielsen S. Pharmacotherapies for cannabis use disorder. Cochrane Database Syst Rev. 2025;9(9):CD008940. https://doi.org/10.1002/14651858.CD008940.pub4 PMid:41025421 PMCid:PMC12481667
9. McGuire P, Robson P, Cubala WJ, Vasile D, Morrison PD, Barron R, Taylor A, Wright S. Cannabidiol as adjunctive therapy in schizophrenia: multicenter randomized controlled trial. Am J Psychiatry.2018;175(3):225-31. https://doi.org/10.1176/appi.ajp.2017.17030325 PMid:29241357
10. Brasil. Agência Nacional de Vigilância Sanitária (Brasil). Resolução da Diretoria Colegiada - RDC n. 1.023, de 11 de maio de 2026. Dispõe sobre a atualização do Anexo I da Portaria SVS/MS nº 344/1998 e alterações na Resolução da Diretoria Colegiada Anvisa nº 1.013, de 30 de janeiro de 2026 e na Resolução da Diretoria Colegiada Anvisa nº 1.015, de 2 de fevereiro de 2026 [Internet]. 2026. https://anvisalegis.datalegis.net/action/ActionDatalegis.php?acao=detalharAto&tipo=RDC&numeroAto=00001023&seqAto=000&valorAno=2026&orgao=RDC/DC/ANVISA/MS&nomeTitulo=codigos&desItem=&desItemFim=&cod_modulo=134&cod_menu=1696
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Copyright (c) 2026 Natália Fernandes Knoerr, Tatiane Caroline Boumer

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