Why Kratom Causes Opioid-Like Withdrawal
Kratom (Mitragyna speciosa) is a plant native to Southeast Asia whose leaves contain alkaloids — primarily mitragynine and 7-hydroxymitragynine — that are partial agonists at the mu-opioid receptor. This is the same receptor activated by heroin, fentanyl, morphine, and oxycodone. At lower doses, kratom has stimulant properties; at higher doses, it produces opioid-like sedation, analgesia, and euphoria.
With daily use, the brain's opioid system adapts just as it does with prescription or illicit opioids: endorphin production decreases, opioid receptor sensitivity drops, and the body becomes physically dependent on kratom to maintain normal function. When kratom is stopped, the opioid system rebounds — producing a withdrawal syndrome that is qualitatively similar to opioid withdrawal, though typically milder in intensity.
This is not widely understood, partly because kratom is sold as a "natural supplement" and marketed in ways that obscure its opioid receptor activity. Many people begin using kratom to manage opioid withdrawal from heroin or prescription opioids — only to develop dependence on kratom itself.
Kratom Withdrawal Symptoms
Diffuse body aches, particularly in the legs — a hallmark of opioid receptor withdrawal, identical to heroin or opioid withdrawal
An intense urge to move the legs, particularly at night — one of the most distressing symptoms and a major cause of insomnia
Sleep is severely disrupted; falling and staying asleep is extremely difficult despite exhaustion
Temperature dysregulation — alternating sweating and chills ("hot and cold flashes"), similar to opioid withdrawal
Often prominent in the peak phase; vomiting is possible but less common than with full opioid withdrawal
Autonomic rebound — increased lacrimation and rhinorrhea are classic opioid withdrawal signs
Often severe; the combination of physical discomfort and anxiety makes the first 3 days particularly intense
Emotional reactivity is heightened; relationships are strained. Documented in clinical kratom withdrawal case series.
Low mood, low motivation, and dysphoria that can persist for weeks after acute withdrawal resolves
Intense urges to take kratom, particularly to relieve the discomfort of withdrawal itself
Kratom Withdrawal Timeline
Onset. Restlessness, anxiety, yawning, and muscle discomfort begin. The timing is slower than heroin withdrawal because kratom's alkaloids have a longer half-life than heroin.
Peak. Maximum intensity across all symptoms: muscle aches, restless legs, insomnia, sweating, nausea, anxiety. The most difficult period. Many relapses occur here.
Plateauing. Physical symptoms begin to ease marginally. Insomnia, anxiety, and cravings remain significant.
Acute phase resolving. Most physical symptoms substantially reduced for many people. Psychological symptoms — depression, anxiety, low energy — remain.
Protracted psychological phase. Low mood, fatigue, irritability, and cravings persist but gradually diminish. Sleep slowly improves.
Recovery. Most people feel significantly better by months 1–2. Intermittent cravings and mood disruption can continue to fade.
Evidence-Based Treatment
Buprenorphine (Suboxone) — off-label, effective
Because kratom acts on opioid receptors, buprenorphine (a partial opioid agonist used as MAT for opioid use disorder) is effective for managing kratom withdrawal under medical supervision. Case reports and clinical experience consistently support its use. A physician can prescribe buprenorphine for kratom withdrawal off-label. This requires a prescription and medical oversight — not a self-managed protocol.
Clonidine — manages autonomic symptoms
Clonidine (a blood pressure medication that dampens the sympathetic nervous system rebound in opioid withdrawal) can manage sweating, anxiety, elevated heart rate, and restlessness during kratom withdrawal. It does not address the opioid receptor itself, but significantly reduces the intensity of autonomic symptoms. Requires physician prescription.
Gradual tapering (self-managed with caution)
Reducing kratom dose gradually — decreasing by 10–20% every 1–2 weeks — can significantly reduce withdrawal severity compared to stopping abruptly. Many kratom users manage tapers without medical supervision. Specific alkaloid content of kratom is not regulated, however, making dose consistency harder than with pharmaceutical medications. A physician or addiction specialist can help structure an evidence-based taper.
Symptomatic support
Over-the-counter and prescription options for specific symptoms: loperamide (Imodium) for diarrhea (low doses only; high doses carry cardiac risk), NSAIDs or acetaminophen for muscle aches, melatonin for sleep, hydroxyzine or diphenhydramine for anxiety and sleep. None of these address the underlying opioid receptor withdrawal, but can make the acute phase more manageable.
Frequently Asked Questions
How long does kratom withdrawal last?
Kratom withdrawal begins 12–24 hours after the last dose, peaks at days 2–3, and the acute physical phase resolves in 5–7 days. Psychological symptoms (depression, anxiety, low energy, cravings) can persist for 1–4 weeks. Post-acute symptoms may continue intermittently for months, particularly after heavy long-term use.
Is kratom withdrawal like opioid withdrawal?
Yes, substantially — because kratom acts on opioid receptors. The symptoms are qualitatively similar: muscle aches, restless legs, sweating, insomnia, anxiety, nausea, and cravings. Kratom withdrawal is generally considered milder than heroin or fentanyl withdrawal, but can be severe, particularly after high-dose daily use for years. The mechanism is the same opioid receptor dependence and rebound.
Can you use buprenorphine for kratom withdrawal?
Yes — buprenorphine (Suboxone) has been used off-label for kratom withdrawal with good results in clinical practice and case reports, because kratom and opioids act on the same receptor. It requires a physician prescription. Clonidine can also manage autonomic symptoms. SAMHSA (1-800-662-4357) can help you find a buprenorphine-prescribing provider near you.
Sources
- Boyer EW et al. Self-treatment of opioid withdrawal using kratom (Mitragynia speciosa korth). Addiction. 2008;103(6):1048–1050. PMID: 18399647
- Singh D et al. Severity of kratom (Mitragyna speciosa korth) dependence, withdrawal symptoms and ability to quit: a cross-sectional study in a rural district in Malaysia. Drug Alcohol Depend. 2014;139:132–137. PMID: 24793623
- Weiss ST et al. Buprenorphine treatment for kratom dependence: a case series. J Addict Med. 2022;16(4):e265–e267. PMID: 34723855
- Prozialeck WC et al. Pharmacology of kratom: an emerging botanical agent with stimulant, analgesic and opioid-like effects. J Am Osteopath Assoc. 2012;112(12):792–799. PMID: 23212430