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Magtein 能否减缓癌症患者的阿片剂量递增?试验揭示了哪些结果

Nova Chen · · 1 min read

Magtein 能否减缓癌症患者的阿片剂量递增?试验揭示了哪些结果

一种以提升记忆和睡眠著称的镁补充剂——Magtein,最近被引入癌症疼痛的临床试验中。研究在 83 名接受口服阿片的晚期癌症患者 中发现,服用 镁‑L‑苏糖酸盐(品牌名 Magtein) 的患者在三个月内所需的吗啡剂量增长仅为安慰剂组的一半左右。需要强调的是,这是一项针对特定人群的小规模研究,绝不能自行修改任何止痛药方案。

头条发现:剂量递增减缓

2023 年发表在 Cancer Medicine 的这篇论文聚焦于 镁‑L‑苏糖酸盐(文中称为 L‑TAMS),该化合物与市面上以 Magtein 为品牌的产品是同一种。它常被宣传为“更易进入大脑的镁”,但本研究并未测量大脑内的镁含量,这一点仅是基于已有文献的推测。

研究的核心问题是:在阿片治疗的基础上加入 L‑TAMS,是否会改变患者所需的阿片剂量。主要结局指标 为每日口服吗啡剂量的增长,因为长期使用阿片的患者往往需要不断提升剂量才能维持镇痛效果。

每日吗啡剂量增长(对比)

  • 第 30 天:9.85 mg/天(L‑TAMS)vs. 20.49 mg/天(安慰剂),p < 0.05
  • 第 60 天:15.96 mg/天 vs. 29.06 mg/天,p < 0.05
  • 第 90 天:21.20 mg/天 vs. 40.44 mg/天,p < 0.01

到第 90 天时,安慰剂组的剂量几乎是 L‑TAMS 组的两倍。两组差异在第 30 天就已出现,摘要未提供更早(第 7、14、21 天)的比较数据。

额外收获:便秘缓解

作者还报告称 L‑TAMS 能显著缓解阿片引起的便秘。便秘是阿片常见且让患者苦恼的副作用,镁本身就是泻药的常用成分,因此这一发现合情合理。摘要未给出具体的便秘改善数据,故难以量化其临床意义。

研究设计概览

  • 设计:前瞻性、随机、双盲、安慰剂对照试验
  • 地点:中国上海某三级医院
  • 受试者:筛选 116 名癌症患者,最终纳入 83 名,全部使用口服阿片
  • 干预:L‑TAMS 胶囊,剂量为 1.5 g 或 2.0 g(依据体重),对照为淀粉安慰剂胶囊
  • 随访:最长 90 天,分别在第 7、14、21、30、60、90 天测量吗啡剂量
  • 利益冲突:作者声明未涉及任何利益冲突

双盲、安慰剂对照是此类研究的金标准,提升了结果的可靠性。

实际意义

  • 剂量解释:试验使用的 L‑TAMS 为 1.5 g 或 2.0 g,但文中未说明这是否指化合物总量还是镁元素含量,也未公布体重分界点。因此不应直接套用到市售 Magtein 的标签上。
  • 服用时机:摘要未披露患者何时服用胶囊。剂量下降的趋势在约 1 个月后出现并持续至 3 个月,更像是长期使用的效应,而非短期“立竿见影”。
  • 适用人群:仅限已在医师监督下使用口服阿片的晚期癌症成人,且面临剂量逐渐升高或便秘困扰的患者。若想尝试,需要与肿瘤科或疼痛科医生充分沟通,而非自行使用。
  • 不适合或需先咨询的情形:
    • 想用它替代处方止痛药——本研究仅把它当作加用药物。
    • 在没有医学指导的情况下自行减量或停药——自行调整阿片剂量风险极大。
    • 肾功能受损或正在服用可能与镁产生相互作用的药物——这是所有镁补充剂的通用警示,需要医师评估。
    • 非癌症疼痛或健康人群——该研究未涉及这些人群。

需要注意的局限性

  1. 样本量小:仅 83 例,需在更大队列中验证。
  2. 单中心:全部受试者来自同一家医院,外推性受限。
  3. 结局为间接指标:剂量递增是疼痛控制的间接指标,但并不等同于患者主观疼痛的缓解。论文以此推断 L‑TAMS “增强镇痛”,仍属推测。
  4. 仅凭摘要:关键细节如退出率、疼痛评分、其他不良事件等未在摘要中披露,本文无法进一步评述。
  5. 机制未证实:本试验未提供镁在大脑或脊髓中如何协同阿片的直接证据。

结论

这项随机、双盲、安慰剂对照试验提示,针对大脑的镁新型形态或许能够帮助晚期癌症患者减缓阿片剂量的增长,并缓解阿片导致的便秘。它是一个值得关注的早期信号,但尚未成为临床标准。任何对该方案感兴趣的患者或照护者,都应首先与负责的医疗团队沟通,让医生依据整体病情进行判断。切勿自行调整阿片用药。

Original study

Read the original research on pubmed.ncbi.nlm.nih.gov →

This article summarizes published research for general information. It is not medical advice.

NC

Written by

Nova Chen

Nova Chen writes for Biocracked: biohacking science, longevity & human performance.

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