Several plants and supplements produce effects that overlap with kratom’s, though none work in exactly the same way. Kratom is unusual because it acts on opioid receptors while also boosting energy at low doses and sedating at higher ones. Finding a true replacement depends on which specific effect you’re after: pain relief, mood lift, relaxation, or help with withdrawal symptoms. Here’s what comes closest in each category.
Akuamma Seeds: The Closest Match for Pain
Akuamma seeds come from the West African tree Picralima nitida and have been used in traditional medicine for pain and fever for centuries. They contain a family of indole alkaloids, the most notable being akuammine, that bind directly to opioid receptors in a way that loosely parallels kratom’s mechanism.
Lab testing shows akuammine binds to the mu-opioid receptor (the same target as morphine and kratom’s key alkaloids) with a binding affinity of 0.30 μM, and akuammidine is nearly identical at 0.32 μM. A different alkaloid in the seeds, akuammicine, binds most strongly to the kappa-opioid receptor at 0.089 μM, which is associated with pain relief but also dysphoria at high doses. These numbers represent moderate binding, not the potent activity of pharmaceutical opioids or even kratom’s strongest alkaloid, 7-hydroxymitragynine. Researchers have specifically noted that the akuamma alkaloids are less potent and have a different signaling profile than kratom’s compounds. In practice, users typically report mild to moderate pain relief and slight sedation, without the energizing quality kratom can have at low doses.
Akuamma seeds are legal in most countries and sold as whole seeds or capsules. They taste intensely bitter. The typical approach is chewing or grinding a single seed (roughly 250 mg of seed material), though dosing is not well standardized and safety data in humans is limited.
Mitragyna Hirsuta and Javanica: Kratom’s Botanical Cousins
These two trees belong to the same genus as kratom (Mitragyna) and are often marketed as legal substitutes. In theory, they should contain related but distinct alkaloids. Mitragyna hirsuta’s primary compound is mitraphylline, not mitragynine, and it’s generally considered much weaker.
There’s a significant catch, though. When researchers at the American Chemical Society tested commercial products labeled as Mitragyna hirsuta and Mitragyna javanica, many actually contained mitragynine and turned out to be mislabeled kratom. Of the ten species in the Mitragyna genus, only Mitragyna speciosa (kratom) is known to produce mitragynine and 7-hydroxymitragynine. So if a “hirsuta” product feels remarkably similar to kratom, it may literally be kratom. Genuine Mitragyna hirsuta leaf produces milder effects, with users reporting gentle relaxation and slight pain relief but nothing close to kratom’s intensity.
Kava: Best for Anxiety and Relaxation
If you use kratom primarily for its calming, anti-anxiety effects, kava is the most established alternative. It works through an entirely different mechanism. Kava’s active compounds, called kavalactones, enhance the activity of GABA-A receptors in the brain. GABA is the nervous system’s main “slow down” signal, so amplifying it produces muscle relaxation, reduced anxiety, and mild euphoria. Specifically, the kavalactone kavain potentiates GABA receptors regardless of their subunit makeup, and it does so through a binding site associated with anesthetics rather than the benzodiazepine site. This means kava feels calming without the cognitive blunting some people experience with prescription anti-anxiety drugs.
Kava has no opioid activity whatsoever, so it won’t help with physical pain the way kratom can. It also won’t produce the stimulating, focused energy that low-dose kratom users enjoy. What it does well is take the edge off anxiety and promote sociability, which is why Pacific Island cultures have used it ceremonially for thousands of years.
Concerns about liver damage circulated widely after kava was briefly banned in parts of Europe in the early 2000s. Over 100 cases of suspected liver injury were reported worldwide over a period of years. But when researchers examined the data more carefully, the incidence ratio came out to roughly 0.008 per million daily doses, which is actually far lower than the liver toxicity rate for common benzodiazepines like diazepam (2.12 per million). Only three cases could be attributed to kava with high probability, and two of those involved overdoses. Kratom’s liver toxicity profile is similarly rare, with only two published case reports as of the most recent comprehensive review, both involving cholestatic injury (bile flow obstruction rather than direct liver cell damage).
Kanna: For Mood and Motivation
Kanna (Sceletium tortuosum) is a South African succulent that’s gaining popularity as a natural mood enhancer. Its primary alkaloid, mesembrine, works as a serotonin reuptake inhibitor with a binding affinity of 1.4 nM at the serotonin transporter. To put that in context, this is a genuinely potent interaction with the same target that prescription antidepressants like SSRIs act on. Kanna also inhibits the PDE4 enzyme, which is involved in inflammation and cognitive function. The combination of serotonin reuptake inhibition and PDE4 inhibition may explain why users report both mood elevation and improved mental clarity.
Kanna feels nothing like an opioid. There’s no pain relief or heavy sedation. What people describe is a subtle lift in mood, reduced social anxiety, and a pleasant sense of well-being. Some users find it mildly stimulating, which makes it a potential stand-in for kratom’s low-dose mood boost. It’s available as dried plant material, teas, tinctures, and standardized extracts. One well-studied extract (marketed as Zembrin) has confirmed serotonin reuptake inhibition in lab testing. Because kanna acts on serotonin, combining it with prescription antidepressants carries a real risk of serotonin syndrome and should be avoided.
Wild Lettuce: Mild Sedation, Not Pain Relief
Wild lettuce (Lactuca virosa) has been called “opium lettuce” for over a century, which sets expectations far too high. The dried sap, called lactucarium, contains lactucin and lactucopicrin, which have mild calming properties. The plant also contains trace amounts of hyoscyamine, an anticholinergic compound that is likely responsible for most of its sedative effect.
This is important because anticholinergic sedation is fundamentally different from opioid-based pain relief. Wild lettuce doesn’t bind to opioid receptors. In reported toxicity cases, it causes symptoms like dilated pupils, dizziness, urinary retention, and decreased gut motility, all classic anticholinergic effects. For mild relaxation or sleep support, some people find it useful in small amounts as a tea or tincture. As a pain reliever or kratom substitute, it falls well short.
Comparing the Options Side by Side
- For pain relief: Akuamma seeds are the closest, with confirmed opioid receptor binding, though weaker than kratom.
- For anxiety and relaxation: Kava is the strongest option, with decades of use and a well-understood GABA mechanism.
- For mood elevation: Kanna acts on serotonin with real potency and produces a noticeable mood lift.
- For mild sedation: Wild lettuce provides gentle calming effects but no meaningful pain relief.
- For “just like kratom”: Nothing replicates kratom’s full profile. Its combination of opioid activity, stimulation, and sedation at different doses is pharmacologically unique among widely available plants.
If You’re Trying to Transition Off Kratom
People searching for kratom alternatives are sometimes looking to reduce or stop their use. Regular kratom users can develop physical dependence, and withdrawal symptoms resemble mild opioid withdrawal: muscle aches, irritability, insomnia, and runny nose.
For people experiencing significant dependence, clinical options exist. Sublingual buprenorphine-naloxone has shown promise as both a detoxification aid and maintenance therapy for kratom-dependent individuals. In clinical settings, clonidine (a blood pressure medication that calms the nervous system) and lofexidine (specifically approved for opioid withdrawal symptoms) have also been used. These aren’t over-the-counter herbs, but they represent the most evidence-backed paths for people dealing with genuine dependence rather than casual use. Tapering kratom gradually, rather than stopping abruptly, is the most common self-directed approach.