Evidence-Based Reviews

Kratom: What we know, what to tell your patients

Current Psychiatry. 2020 March;19(3):37-42

References

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There is a lack of quality control of commercially available kratom preparations. The FDA has found kratom products that exceeded the level of safe exposure to nickel and lead.³⁵ There have also been reports of Salmonella outbreaks associated with kratom products.³⁶

Detecting kratom use

Mitragynine is a lipophilic alkaloid that is poorly soluble in water³⁷ and eliminated primarily in urine.¹² Based on data from treatment center admissions, kratom can be detected in urine samples for 5 to 6 days after use.^24,38,39 However, kratom is not detectable by a standard urine toxicology screen; therefore, a high degree of suspicion and special confirmatory testing are necessary. The breakdown products of mitragynine can be detected through gas chromatography coupled with mass spectrometry (GC/MS), liquid chromatography with linear ion trap mass spectrometry, or electrospray tandem mass spectrometry.^40-42

A familiar withdrawal syndrome

Abrupt discontinuation of high-dose, long-term kratom use can produce withdrawal symptoms.¹³ Symptoms of kratom withdrawal resemble those of opioid withdrawal. These include physiological symptoms (mydriasis, nausea, sweating and chills, muscle and body aches, tremors and twitches, diarrhea, rhinorrhea, and lacrimation) and psychological symptoms (insomnia, restlessness, irritability/hostility, fatigue, anxiety, mood disturbances, and hallucinations).¹³ Symptoms are first noted starting 12 hours after the last use of kratom, and can last up to 7 days.⁴³ Withdrawal intensity has been positively correlated with the daily amount of kratom consumed, as well as the duration and frequency of use.^13,16

In 2 case reports, the newborns of women who used kratom during pregnancy experienced neonatal abstinence syndrome.^44,45 In these 2 reports, symptoms such as jitteriness, irritability, feeding intolerance, and vomiting emerged on postpartum Day 2. The newborns were admitted to a neonatal ICU and started on a standard opioid protocol with IV morphine and subsequently tapered with an oral formulation over 5 days.^44,45

Helping patients who use kratom

The best approach to treating a patient who is experiencing kratom withdrawal is symptomatic management, as would be appropriate for a patient experiencing opioid withdrawal.¹³ However, the use of agents such as methadone or buprenorphine for patients undergoing kratom withdrawal has not been thoroughly evaluated; very few reports have been published.^46,47

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Kratom: What we know, what to tell your patients

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Detecting kratom use

A familiar withdrawal syndrome

Helping patients who use kratom

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