Full Text of 2018 HHS Letter to DEA Rescinding Kratom Ban Recommendation

Office of the Secretary
Office of the Assistant Secretary for Health
Washington, D.C. 20201

AUG 16 2018 [stamped]

The Honorable Uttam Dhillon
Acting Administrator
Drug Enforcement Administration
U.S. Department of Justice
8701 Morrissette Drive
Springfield, VA 22152

Dear Mr. Dhillon:

Pursuant to the Controlled Substances Act (CSA), 21 U.S.C. § 811, I am rescinding our prior recommendation dated October 17, 2017, that the substances mitragynine and 7-hydroxymitragynine be permanently controlled in Schedule I of the CSA. HHS is instead recommending that mitragynine and 7-hydroxymitragynine not be controlled at this time, either temporarily or permanently, until scientific research can sufficiently support such an action. Mitragynine and 7-OH-mitragynine are two of the constituents of the plant Mitragyna speciosa (M. speciosa), commonly referred to as kratom. This decision is based on many factors, in part on new data, and in part on the relative lack of evidence, combined with an unknown and potentially substantial risk to the public health if these chemicals were scheduled at this time. Further research, which I am proposing be undertaken, should provide additional data to better inform any subsequent scheduling decision.

Procedural History

On August 31, 2016, the Drug Enforcement Administration (DEA) issued a Notice of Intent to temporarily schedule the chemicals mitragynine and 7-hydroxymitragynine into Schedule I pursuant to the temporary scheduling provisions of the CSA, 21 U.S.C. § 811(h). See, 81 Fed. Reg. 59,929 (Aug. 31, 2016). In response to the Notice of Intent, the DEA received numerous comments from the public on mitragynine and 7-hydroxymitragynine, including comments offering their opinions regarding the pharmacological effects of these substances. To allow consideration of these comments, as well as others received on or before December 1, 2016, the DEA issued a Withdrawal of Notice of Intent and Solicitation of Comments on October 31, 2016.

On October 17, 2017, the then-Acting Assistant Secretary for Health of HHS wrote to then-Acting Administrator of the DEA to indicate that HHS was recommending that the substances mitragynine and 7-OH-mitragynine be permanently controlled in Schedule I of the Controlled Substances Act. Recently, I became aware of DEA’s intent to schedule mitragynine and 7-OH-mitragynine – into Schedule I.


The Controlled Substances Act (“CSA”) provides in pertinent part that the Attorney General may by rule add to Schedule I any drug or other substance if the Attorney General makes the findings prescribed by subsection (b) of section 812 of the CSA for Schedule I. See, 21 U.S.C. § 811(a). Such findings are:

  1. The drug or other substances has a high potential for abuse.
  2. The drug or other substances has no currently accepted medical use in treatment in the United States
  3. There is a lack of accepted safety or use of the drug or other substance under medical supervision.

The CSA requires that “[i]n making any finding under subsection (a) of this section or under subsection (b) of section 812 of this title, the Attorney General shall consider the following factors with respect to each drug or other substance proposed to be controlled or removed from the schedules:

(1) Its actual or relative potential for abuse.
(2) Scientific evidence of its pharmacological effect, if known.
(3) The state of current scientific knowledge regarding the drug or other substance.
(4) Its history and current pattern of abuse.
(5) The scope, duration, and significance of abuse.
(6) What, if any, risk there is to the public health.
(7) Its psychic or physiological dependence liability.
(8) Whether the substance is an immediate precursor of a substance already controlled under this subchapter.”

21 U.S.C. § 811(c).

Before scheduling a substance, though, the Attorney General must “request from the Secretary (of HHS) a scientific and medical evaluation, and his recommendation, as to whether such drug or other substance should be so controlled or removed as a controlled substance.” Id. at § 811(b). The Secretary’s evaluation should be based on factors (2), (3), (6), (7), and (8), noted above, and the scientific and medical considerations involved in factors (1), (4), and (5). Moreover, the “recommendation of the Secretary to the Attorney General shall be binding on the Attorney General as to such scientific and medical matters, and if the Secretary recommends that a drug or other substance not be controlled, the Attorney General shall not control the drug or other substance.” Id.

The Secretary has delegated to the Assistant Secretary for Health, in consultation with the National Institute on Drug Abuse and the Food and Drug Administration, the responsibility to make a recommendation under the CSA to the Attorney General. On October 17, 2017, my predecessor, the Acting Assistant Secretary for Health, forwarded to you his recommendation that mitragynine and 7-hydroxymitragynine be permanently controlled in Schedule I of the CSA. The recommendation included a scientific and medical evaluation prepared by the FDA of the eight factors determinative of control under the CSA. The FDA evaluation also recommended in favor of the three findings that are required for DEA to place a substance in Schedule I.

I have reviewed the Acting Assistant Secretary’s earlier recommendation as well as previous and new scientific data. In light of this review, combined with concerns for unintended public health consequences, I now conclude that while mitragynine and 7-hydroxymitragynine have many properties of an opioid, scheduling these chemicals at this time in light of the underdeveloped state of the science would be premature. For example, one recently published peer reviewed animal study indicated that mitragynine does not have abuse potential and actually reduced morphine intake. As such, these new data suggest that mitragynine does not satisfy the first of the three statutory requisites for Schedule I, irrespective of broader considerations of public health. While a single study is rarely dispositive, it strongly suggests that further evaluation is warranted.

Although there remains cause for concern for 7-hydroxymitragynine and potentially mitragynine, the level of scientific data and analysis presented by the FDA and available in the literature do not meet the criteria for inclusion of kratom or its chemical components in Schedule I of the CSA at this time. There is still debate among reputable scientists over whether kratom by itself is associated with fatal overdoses. Further analysis and public input regarding kratom and its chemical components are needed before scheduling should be undertaken. It is important that we have additional information to justify scheduling, such as:1

  • A scientific assessment of how many Americans utilize kratom, and an understanding of the geographic and demographic distribution of these users (Factors 4, 5);
  • A scientific assessment of the actual scale and degree of dependence and/or addiction of Americans utilizing kratom (Factors 1, 5, 7);
  • A scientific determination based on data whether kratom actually serves as a gateway drug that promotes further use of more dangerous opioids (Factors 1, 4, 5);
  • A valid prediction of how many kratom users will suffer adverse consequences if kratom is no longer available, including:
    • Intractable pain, psychological distress, risk for suicide;
    • Transition to proven deadly opioids such as prescription opioids, heroin, or fentanyl; and
    • Transition to other potent or harmful drugs (Factor 6);
  • A scientifically valid assessment of causality in the current few deaths in which kratom was co-utilized with known lethal drugs such as fentanyl (Factors 1, 2, 3, 5, & 6).

Furthermore, there is a significant risk of immediate adverse public health consequences for potentially millions of users if kratom or its components are included in Schedule I, such as:

  • Suffering with intractable pain;
  • Kratom users switching to highly lethal opioids, including potent and deadly prescription opioids, heroin, and/or fentanyl, risking thousands of deaths from overdoses and infectious diseases associated with IV drug use;
  • Inhibition of patients discussing kratom use with their primary care physicians leading to more harm, and enhancement of stigma thereby decreasing desire for treatment, because of individual users now being guilty of a crime by virtue of their possession or use of kratom
  • The stifling effect of classification in Schedule I on critical research needed on the complex and potentially useful chemistry of components of kratom.

Therefore, I conclude at the current time, available evidence does not support mitragynine and 7-hydroxymitragynine being controlled in Schedule I of the Controlled Substances Act. This assessment supersedes the previous recommendation letter from Acting Assistant Secretary Wright dated October 17, 2017. In the meantime, it is recognized that kratom may potentially have harmful effects, especially in specific circumstances and/or when used with potent prescription or illicit drugs.

Finally, it is entirely possible that new data and evidence could support scheduling of chemicals in kratom at some future time. Kratom may have harmful effects, particularly when used with other drugs. As such, I encourage continued enforcement by the FDA against unproven claims by kratom manufacturers. I also support enhanced public awareness that kratom contains molecules that may potentially be dangerous. I also plan to work expeditiously with colleagues throughout the U.S. government to seek transparent public and scientific input, and to collect data on the critical public health considerations outlined above.

Should you have any questions regarding this recommendation, please contact my office at (202) 690-7694.

Sincerely yours,


Bret P. Giroir, M.D.
ADM, U.S. Public Health Service
Assistant Secretary for Health
Senior Advisor for Opioid Policy

1I am also concerned about the impact of scheduling kratom on our ability to conduct research, especially survey research and our currently [sic] inability to routinely test for kratom in those brought into an emergency room as a result of a possible overdose.

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