Effects of cannabinoids on pain control, quality of life and opioid-sparing in cancer patients: systematic review
Utilização de canabinoides no controle da dor, na qualidade de vida e no efeito poupador de opioides em pacientes com câncer: revisão sistemática
Sílvia Silva Sá; Cecília Melo-Alvim; Paulo Reis-Pina
Abstract
BACKGROUND AND OBJECTIVES: Cannabinoids, such as delta-9-tetrahydrocannabinol and cannabidiol, have several therapeutic properties that may be useful in medicine. The objective of this study was to analyze the impact of cannabinoid use on pain control, quality of life and opioid-sparing in patients with advanced cancer.
CONTENTS: A systematic review of the evidence for the use of cannabinoids in patients with advanced cancer was conducted on: 1) Pain control; 2) Quality of life; and 3) Opioid-sparing effect. Pubmed, Web of Science and Cochrane databases were searched for articles, written in English, published between January 1, 2011, and December 31, 2022, with the filters “randomized controlled trials” and “clinical trials”. Using oral formulations of cannabinoids was accepted as “intervention” and placebo as “control”. Risk of bias analysis was performed with Cochrane’s RoB 2 and ROBINS-I tools. This review followed the 2020 PRISMA-
statement. Ten studies were included, with 1169 participants, most with moderate risk of bias. The studies were from Australia (n=4), Canada (n=1), Israel (n=1), Mexico (n=1), The United Kingdom (n=1); two were multinationals. Eight were randomized, placebo-controlled trials; two were non-randomized studies. The most used formulation was nabiximols oral spray. Cannabinoids provide a clinical improvement in pain control. Evidence of improved quality of life with cannabinoids is inconclusive. Cannabinoids do not affect the daily dose of opioids in refractory cancer pain. Cannabinoid use cannot be said to have an opioid-sparing effect.
CONCLUSION: It is necessary to expand research on the prescription of cannabinoids in individuals with cancer and other progressive diseases, with several comorbidities and multiple medications, in different health contexts.
Keywords
Resumo
JUSTIFICATIVA E OBJETIVOS: Os canabinoides, como o delta-9-tetrahidrocanabinol e o canabidiol, possuem propriedades terapêuticas que podem ser úteis em pacientes oncológicos. O objetivo deste estudo foi avaliar o impacto do uso de canabinoides no controle da dor, na melhoria da qualidade de vida, e no efeito poupador de opioides em pacientes com câncer avançado.
CONTEÚDO: Realizou-se uma revisão sistemática sobre a evidência da utilização de canabinoides em pacientes com câncer avançado, relativamente a: 1) Controle da dor; 2) Qualidade de vida; e 3) Efeito poupador de opioides. Foram buscados artigos na Pubmed, Web of Science e Cochrane, em inglês, publicados entre 2011 e 2022, com os filtros “randomized controlled trials” e “clinical trials”. Aceitaram-se como “intervenção” qualquer uso de formulações orais de canabinoides e como “controle” o uso de placebo. Fez-se análise de viés com as ferramentas da Cochrane RoB 2 e ROBINS-I. Seguiu-se a Declaração PRISMA 2020. Foram incluídos 10 estudos, com 1169 participantes, a maioria com risco moderado de viés. Os estudos provinham de Austrália (n=4), Canadá (n=1), Israel (n=1), México (n=1), Reino Unido (n=1); dois eram multinacionais. Oito eram ensaios randomizados controlados com placebo; dois eram não randomizados. A formulação mais usada foi spray bucal de nabiximóis. Os canabinoides proporcionam uma melhoria clínica do controle da dor. A evidência da melhoria da qualidade de vida com canabinoides é inconclusiva. Os canabinoides não afetam a dose diária de opioides na dor oncológica refratária. Não se pode afirmar que o uso de canabinoides tem um efeito poupador de opioides.
CONCLUSÃO: É necessário incrementar a investigação sobre a prescrição de canabinoides em indivíduos com câncer e outras doenças progressivas, com comorbilidades e polimedicação, em diferentes contextos de saúde.
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Submitted date:
06/08/2023
Accepted date:
08/10/2023
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