Here’s the short answer: 7-OH is a compound from the kratom plant that the research describes as having opioid-like properties, and the University of Washington’s 2025 kratom and 7-OH research brief pairs kratom’s potential therapeutic benefits with real safety concerns. Below you’ll find what the studies and regulators say, how the law stands in plain terms, and what to check before you decide.
Affiliate disclosure: Heads up, affiliate links appear on this page. If you buy through one of them, this site may earn a commission. This costs you nothing extra.
What is 7-OH, and how is it different from kratom?
Kratom is a plant from Southeast Asia. The UW kratom and 7-OH research brief names two of its main psychoactive components, mitragynine and 7-hydroxymitragynine (7-OH), and says both have opioid-like properties. 7-OH also occurs naturally in kratom leaf as a minor alkaloid, under 2% of the total, according to an FDA assessment of the compound titled “7-Hydroxymitragynine (7-OH): An Assessment of the Scientific Data and Toxicological Concerns Around an Emerging Opioid Threat.” In an FDA Direct podcast on 7-OH, an FDA speaker describes 7-OH as a synthetic, concentrated product and says it is found in kratom in very small amounts.
| Compound | What it says |
|---|---|
| Mitragynine | One of kratom’s two main psychoactive components, described as having opioid-like properties in the UW brief. A 2021 study in The Journal of Pharmacology and Experimental Therapeutics compared it with 7-OH. |
| 7-OH (7-hydroxymitragynine) | Occurs naturally in kratom leaf as a minor alkaloid, under 2% of the total, according to the FDA assessment. The FDA speaker describes concentrated 7-OH products as synthetic. The UW brief lists it among the compounds with opioid-like properties. |
What does 7-OH do in the brain?
The research so far points to activity at opioid receptors. A 2004 study titled “Antinociceptive effect of 7-hydroxymitragynine in mice: Discovery of an orally active atypical opioid analgesic,” published in Life Sciences, reported a pain-reducing effect in mice. A 2021 study in The Journal of Pharmacology and Experimental Therapeutics compared mitragynine and 7-OH for their affinity and efficacy at the mu-opioid receptor, and for opioid-like behavior in rats. Both are animal studies, so they describe what happened in mice and rats, not what 7-OH does in people. The FDA speaker calls 7-OH a synthetic opioid.
Are opioids bad for you, and does mitragynine get you high?
Whether opioids in general are bad for you is a bigger question than this page covers. For 7-OH, the point that matters is that the UW brief places it in the opioid-like group. The FDA speaker also points out that you can buy an opioid in a vape store without a prescription, and presents that as the worrying part.
On whether mitragynine produces a high, the UW brief does not directly answer that question. It describes both compounds as opioid-like. Another kratom guide notes that at lower doses, some people report stimulant-like effects from kratom, and at higher doses, opioid-like effects.
Is 7-OH getting banned, and where is it legal in the US?
The UW brief says the FDA recommended in August 2025 that products containing 7-OH be scheduled under the Controlled Substances Act, a step that would restrict access to them. The same brief says kratom has been banned in several states but remains legal in Washington State, where it can often be found in gas stations or smoke shops.
In plain terms, scheduling puts a substance under the Controlled Substances Act’s rules. A recommendation is not the same as a final rule, so check the DEA’s scheduling notices and the Federal Register for 7-OH’s current federal status. State rules differ, and our kratom legal status by state guide walks through the state picture. For the federal side, see kratom and the fda.
Can you buy 7-OH online, and does it show on a drug test?
The UW brief does not say whether 7-OH can be bought online. It describes sales in gas stations and smoke shops in Washington, and the FDA speaker describes vape stores. Before you buy from any seller, online or in person, check your state’s current rules and the federal status described above.
The UW brief does not address whether 7-OH shows up on a drug test. Ask the test provider directly which substances its screen detects.
What are the safety risks of 7-OH?
| Concern | What it says |
|---|---|
| Opioid-like activity | The UW brief describes both kratom compounds as opioid-like. The FDA speaker calls 7-OH a synthetic opioid. |
| Concentration | 7-OH is a minor alkaloid in kratom leaf. The FDA speaker describes concentrated 7-OH products as synthetic. |
| Access | The FDA speaker says 7-OH products are sold in vape stores, and that you can buy an opioid there without a prescription. |
| Mixing with other substances | One kratom guide says kratom-related poisonings and deaths have been reported, especially when kratom is combined with alcohol, benzodiazepines or prescription opioids. |
| Product strength | The same guide says some powders, capsules and extracts may be contaminated or much stronger than advertised. |
| Research | The UW brief says more research is needed to understand kratom’s effects, and notes potential therapeutic benefits alongside safety concerns. |
Mixing 7-OH with other medicines is its own question, and our kratom and prescription drug interactions guide covers it. If someone is struggling to breathe or can’t be woken up, call 911 right away.
What should you check before you buy?
- Your state’s current rules, using the state guide linked above.
- The federal status: the DEA’s scheduling notices and the Federal Register.
- The label, for what it lists about 7-OH and any other alkaloids. Ask the seller for it before you order.
- Any medicine you take. Check interactions before you start a new product.
By KratomCBDDirect.com Editorial Team
Leave a Reply