Plant Psychedelics / Opioids
Kratom
A Southeast Asian plant that acts like a stimulant at low doses and an opioid at high doses. It's legal in most U.S. states, available at gas stations, and has a dependence profile that most users discover too late. Kratom is neither as safe as its advocates claim nor as dangerous as the FDA suggests.
The Basics
Two substances in one plant
Kratom is genuinely dose-dependent in a way most substances aren't. At low doses (1–3g), the dominant alkaloid mitragynine produces stimulant-like effects: energy, focus, mood elevation, mild euphoria. At higher doses (5–8g+), 7-hydroxymitragynine dominates: sedation, pain relief, and a warm opioid-like feeling. These are mechanistically different effects from different compounds at different receptor targets.
This dual nature is why kratom is so polarizing. People using it for energy and focus at low doses have a completely different experience and risk profile than people using it for pain management or opioid withdrawal at high doses. Both groups are using kratom. They're essentially using different drugs.
⚠ The dependence question
Daily kratom use produces physical dependence. Withdrawal symptoms — anxiety, irritability, muscle aches, insomnia, restless legs, sweating — are real and can be significant. They're generally less severe than traditional opioid withdrawal, but they are opioid withdrawal. Anyone using kratom daily for more than 2–3 weeks should taper rather than stop abruptly. If you're using kratom to manage opioid withdrawal, know that you may be replacing one dependence with another.
The Science
Partial agonist pharmacology
Kratom's primary alkaloids interact with opioid receptors differently than traditional opioids — and this distinction matters for both effects and safety.
Mitragynine
Partial agonist at mu-opioid receptors. Also acts on adrenergic and serotonergic systems — which explains the stimulant effects at low doses. Constitutes ~66% of kratom's alkaloid content.
7-hydroxymitragynine
Much more potent mu-opioid agonist than mitragynine (~13x more potent). Present in small quantities but dominates the pharmacology at higher doses. This is the compound responsible for sedation and pain relief.
Partial agonist ceiling
Unlike full opioid agonists, kratom has a ceiling effect for respiratory depression — the primary cause of opioid overdose death. Kratom alone is very unlikely to cause fatal respiratory depression. Combined with other depressants, this protection disappears.
Strain marketing
Red, green, white, gold "strains" are largely marketing. Vein color at harvest and drying/curing methods affect alkaloid ratios somewhat, but vendor quality control varies enormously. The strain system oversimplifies real variability.
Dosing Guide
Low dose and high dose are different experiences
These doses are for dried leaf powder — the most common form. Extract products are significantly more concentrated and use a completely different scale. If you're using extracts, the numbers below do not apply.
Low / Stimulant
1–3g
Energy, focus, mild euphoria, sociability. Comparable to strong coffee with a mood lift. This is the dose range most people start with and many stay at. Nausea uncommon at this level.
Moderate / Mixed
3–5g
Transitional zone. Some stimulation, some sedation. Pain relief begins. Mood elevation stronger. Nausea becomes more common. Wobbles (eye-wobble / dizziness) can start appearing at the higher end.
High / Opioid
5–8g+
Sedation, significant pain relief, strong euphoria in opioid-naïve users, nausea, wobbles. This is functionally an opioid experience. Tolerance builds fast at this range, and dependence potential is real.
⚠ Extract products
Kratom extracts and "enhanced" products concentrate alkaloids dramatically. A single extract capsule or shot can contain the equivalent of 10–20g of leaf powder. These products carry significantly higher dependence risk and make dosing control much harder. If you use kratom, plain leaf powder gives you the most control over what you're taking.
Harm Reduction
The risks people don't talk about
Physical dependence develops with daily use. Most people who use kratom daily for 3+ weeks will experience withdrawal symptoms if they stop. This isn't a moral failing — it's pharmacology. Taper if you want to stop.
Do not combine with other opioids, benzodiazepines, or alcohol. Kratom's respiratory depression ceiling disappears when combined with other depressants. Most kratom-associated deaths involve polysubstance use.
Liver toxicity is rare but documented. Cholestatic hepatotoxicity has been reported in heavy, long-term users. If you develop jaundice, dark urine, or abdominal pain, stop immediately and see a doctor.
Adulteration is a real concern. Unregulated kratom products have been found contaminated with heavy metals, salmonella, and even synthetic opioids. Buy from vendors who provide third-party lab testing. The American Kratom Association's GMP program is a minimum standard.
Kratom for opioid withdrawal is a legitimate but complex strategy. It can significantly ease withdrawal from stronger opioids. But it replaces one opioid dependence with another — less dangerous, but still real. Go in with a taper plan, not an indefinite substitution.
The "wobbles" are a dose signal. Eye-wobble, dizziness, and nausea at higher doses are your body telling you the dose is too high. Back off. These aren't dangerous, but they indicate you've exceeded your useful range.
Cardiovascular considerations. Heavy kratom use has been associated with QT prolongation and cardiac events in case reports. People with arrhythmias, structural heart disease, or QT prolongation should treat this as a contraindication. Kratom is also a significant CYP3A4 inhibitor — relevant for anyone on polypharmacy.
Pregnancy and conception. Pregnancy is a contraindication. Neonatal abstinence syndrome from kratom use during pregnancy is documented. Breastfeeding is also a contraindication. Same applies if you're actively trying to conceive.
MAOIs, tramadol, SSRIs, and CYP3A4. Mitragynine has serotonergic activity. Combinations with SSRIs, MAOIs, or tramadol carry under-characterized but real interaction risks including serotonin syndrome. Mitragynine is also metabolized partly via MAO — MAOIs can significantly potentiate kratom effects. Kratom is also a significant CYP3A4 inhibitor, relevant for anyone on polypharmacy. Talk to your prescriber if you're on serotonergic medication.
Legal Landscape
Legal federally, banned in some states
Legal (Most States)
Not federally scheduled · Legal in most U.S. states · Available in smoke shops, online, and gas stations · FDA has tried and failed to schedule it
Regulated
Some states require age verification (21+) · AKA Kratom Consumer Protection Acts in several states · GMP standards voluntary
Banned
Alabama · Arkansas · Indiana · Rhode Island · Vermont · Wisconsin · Some cities/counties in otherwise legal states
Tim's Take
Kratom is one of the substances where I think the regulatory conversation and the user conversation have both gotten it wrong in different directions.
The regulatory framing — that kratom is an unapproved opioid that should be scheduled — misses what kratom actually is. Mitragyna speciosa is a Southeast Asian tree in the coffee family, used for centuries for energy, pain, and mood. Its active alkaloids, mitragynine and 7-hydroxymitragynine, bind partially at mu-opioid receptors but with a different profile than classical opioids. At low doses it's stimulating, at higher doses it's sedating. The overdose profile is better than morphine because of what's called partial agonism — there's a ceiling effect on respiratory depression that classical opioids don't have.
The user framing — that kratom is a harmless plant and "just coffee" — also misses what kratom actually is. It's an opioid-receptor-active substance that produces tolerance, physical dependence, and withdrawal that looks like classical opioid withdrawal: restless legs, sweating, anxiety, GI distress, insomnia. Heavy daily users absolutely are dependent even if they don't like the word. The "I quit kratom cold turkey and it was fine" stories are real for some people at low doses and much harder for heavy users, and the self-reporting in the community underplays how rough the withdrawal can be for people at the heavier end.
The gas station problem is the one that matters most acutely. Kratom sold at gas stations and smoke shops has been contaminated with everything from synthetic opioids to high concentrations of 7-hydroxymitragynine (which is the more potent alkaloid, and some products are now being sold as 7-OH concentrates with a radically different risk profile than traditional powdered leaf kratom). The AKA advocates reasonable quality standards for a reason — the unregulated supply is a problem.
If you use kratom, buy from vendors who do third-party testing and publish results. Stay on powdered leaf and be wary of 7-OH extracts. Rotate strains or take breaks to manage tolerance. Be honest with yourself about whether you're dependent. And know that if you use it regularly and decide to stop, the withdrawal is real and tapering is easier than cold turkey.
If you or someone you know needs support
The Fireside Project provides free emotional support during or after a psychedelic experience. For opioid-related support, SAMHSA's helpline is available 24/7 at 1-800-662-4357.
Fireside: Call or text · Available 24/7 · Free · Non-judgmental
Know Before You Go
Based on documented risks and harm reduction literature, practitioners typically advise the following.
Low dose = stimulant. High dose = opioid. These are mechanistically different effects. Know which one you're using.
Daily use produces physical dependence within weeks. Withdrawal is real. Taper if you want to stop.
Never combine with other opioids, benzos, or alcohol. The respiratory depression ceiling disappears.
Extract products are dramatically stronger than leaf powder. Use plain leaf for dosing control.
Buy from vendors with third-party lab testing. Adulteration with heavy metals and contaminants is documented.
SAMHSA helpline: 1-800-662-4357 · 24/7 · Free
Last reviewed