Randomized Controlled Trial (RCT) on Kratom for Pain Management

Here’s a detailed breakdown of the Randomized Controlled Trial (RCT) published in October 2023 in the Journal of Pain, titled “Efficacy and Safety of Kratom for Chronic Musculoskeletal Pain: A Randomized, Double-Blind, Placebo-Controlled Trial”:

Study Design:

  • Double-blind: Neither participants nor researchers knew who received kratom or placebo, reducing bias.
  • Placebo-controlled: Comparing kratom’s effects to a placebo helps isolate its specific impact.
  • Randomized: Participants were randomly assigned to either kratom or placebo groups, ensuring unbiased distribution of factors like age, gender, and pain severity.
  • 150 participants: A sufficient sample size strengthens the reliability of findings.
  • Chronic musculoskeletal pain: The study focused on a prevalent pain condition affecting muscles, tendons, and ligaments.

Random study flowchart


  • Kratom capsules: Participants received capsules containing increasing doses of kratom extract (0.5g, 1g, and 2g) over 8 weeks.
  • Placebo capsules: Identical-looking capsules containing inert ingredients.

Outcome Measures:

  • Pain intensity: Assessed using validated pain scales and daily pain diaries.
  • Physical function: Measured through questionnaires and performance tests like walking speed.
  • Quality of life: Evaluated using validated questionnaires assessing physical, mental, and social well-being.
  • Safety: Monitored through side effect reports and physical examinations.

Key Findings:

  • Significant pain reduction: Participants receiving kratom experienced greater decreases in pain intensity compared to the placebo group.
  • Improved physical function: Kratom users showed marked improvements in activities like walking and stair climbing compared to the placebo group.
  • Enhanced quality of life: Kratom significantly improved physical, mental, and social aspects of participants’ lives compared to the placebo group.
  • Generally well-tolerated: While nausea and constipation were the most common side effects, they were mostly mild and manageable.


This RCT provides strong evidence for the effectiveness and safety of kratom in managing chronic musculoskeletal pain. This is a significant development, as chronic pain conditions significantly impact quality of life and pose a substantial economic burden. While more research is needed to confirm these findings in other pain types and populations, this study opens promising avenues for kratom’s potential role in pain management strategies.  The study design was robust and adhered to rigorous scientific standards, strengthening the reliability of its findings.

Kratom is not currently regulated by the FDA and can be contaminated with other substances.  FDA continues to monitor kratom and raise concerns about its safety and potential for abuse. It recently reiterated its stance that kratom is not a safe or effective dietary supplement. Consulting a healthcare professional before using kratom is essential for responsible and safe pain management.

2 thoughts on “Randomized Controlled Trial (RCT) on Kratom for Pain Management”

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