What are the adverse effects of Kratom (Mitragyna speciosa)?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: March 17, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Guidelines

Kratom use is associated with significant adverse effects, including opioid- and stimulant-like properties, withdrawal syndrome, neurologic effects, and seizures, and therefore, its use is not recommended, as stated by the Society for Perioperative Assessment and Quality Improvement (SPAQI) consensus statement 1. The adverse effects of Kratom (Mitragyna speciosa) can be severe and include:

  • Opioid- and stimulant-like properties
  • Withdrawal syndrome if taking more than 5 to 15 g per day
  • Neurologic effects, including seizures, with chronic use
  • The FDA warns against the use of Kratom due to its potential health risks The SPAQI consensus statement recommends discontinuing Kratom use due to these adverse effects 1. It is essential to consider the potential interactions between Kratom and other medications, as well as its unregulated status, which can lead to varying potency and purity between sources. The risks associated with Kratom use, as outlined in the SPAQI consensus statement, highlight the importance of avoiding its use, especially in the preoperative period, to minimize potential complications and ensure patient safety 1.

From the Research

Adverse Effects of Kratom

The adverse effects of Kratom (Mitragyna speciosa) are numerous and can be severe. Some of the reported adverse effects include:

  • Intrahepatic cholestasis, seizure, arrhythmia, impaired memory function, coma, and death 2
  • Psychological manifestations such as euphoria, feeling relaxed, aggression, hostility, and psychosis 2
  • Medical manifestations such as polyuria, dry mouth, vomiting, and jerky movements 2
  • Hepatic, cardiac, and CNS effects, with the potential to cause fatalities, primarily as part of polydrug exposures 3
  • Respiratory depression, although not commonly reported 4
  • Drug interactions as both a cytochrome P-450 system substrate and inhibitor 4
  • Gastrointestinal related negative effects, including nausea and constipation, mainly presenting at high and more frequent dosing 5
  • Kratom-induced seizures, as reported in a case study of a 27-year-old Caucasian male with a psychiatric history 6

Health Impact and Risks

The health impact and risks associated with Kratom use are significant. Some of the reported health impacts and risks include:

  • Kratom preparations have raised concerns of public health and safety in the US 5
  • Kratom use has been linked to 44 deaths, as reported by the U.S. Food and Drug Administration in 2018 6
  • The Centers for Disease Control and Prevention has reported 91 deaths directly linked to Kratom use in 2019 6
  • Kratom use can lead to withdrawal signs/symptoms, and its high abuse liability, potential for drug interactions, and adverse events are concerning 4

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Pharmacologic and clinical assessment of kratom: An update.

American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists, 2019

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.