Is Mitragynine legal in Thailand?

Legal status

Neither mitragynine nor kratom is separately scheduled in Thailand: kratom was removed from Narcotics Category 5 by the Narcotics Act (No. 8) B.E. 2564 (2021), and mitragynine, the principal alkaloid of kratom, is a constituent of the now-legal plant, decriminalised together and regulated (not prohibited) under the Kratom Plant Act B.E. 2565 (2022), with sale to minors/pregnant women restricted. [Likely] That finding is carried forward from the entry published before this batch and was not re-derived from statute in this pass. Not confirmed for Mitragynine, and the reason is a reach question that did not settle rather than an absence that did. The search ran in Thai and in Latin script across the Thai FDA narcotics table updated 15 September 2025 and the B.E. 2565 psychotropic naming notices. The nearest entry it reached was kratom, and that was rejected because it is a different molecule and this scheme names molecules rather than families. The alkaloid and the leaf are different objects, and the near entry pulls in the opposite direction: this row rejected Kratom as an entry it reached, a rejected near entry is normally an entry that exists, and this table's kratom row nonetheless reports the leaf as a closed list absence, so the two rows contradict each other and that contradiction is unresolved here. A second check of the Narcotics Code's salts, derivatives and preparations language and of the Minister's notification power did not establish that Mitragynine is automatically caught, so the exact criminal classification remains open. This is not a finding that Mitragynine is uncontrolled in Thailand, and it is not a finding that the near entry catches it either.

Consequences if caught

Capital exposure: not established. No capital and no life exposure can be stated for Mitragynine and neither can be ruled out, because no category was proved and in this scheme the ceiling follows the placement: with the placement open there is no section 145, 146 or 149 figure to attach. The rejected near entry carries its own exposure and it is not this substance's, since kratom is recorded in this table as a closed list absence, which makes the near entry a weak anchor. If a later notification placed Mitragynine in Category I, the section 145 paragraph 3 death alternative would still be discretionary and circumstance based, reserved for an organised network leader or a state or public security impact, and never triggered by a stated quantity. Treat the risk as unquantified rather than as low.

If prescribed or medical

No proved schedule placement exists for Mitragynine in this reading, so there is no category to attach a medical or traveller route to. Thailand's country level traveller rule for personal medication was not established by this reading. The sources opened were the Narcotics Code B.E. 2564, the Thai FDA narcotics table updated 15 September 2025 and the B.E. 2565 psychotropic naming notices in the Royal Gazette, and the dossier is explicit that its findings come from those naming instruments and not from a traveller permit label, so no import permit route, no personal supply quantity ceiling and no certificate requirement can be stated here for Mitragynine. Two things are open at once here, the classification and the permission, and the second cannot be answered before the first. What is missing from this row is the permission, not the classification, and the gap is in what was read rather than a finding that no lawful route exists. A kratom product is answered by the leaf row and by this alkaloid row differently, and by the 7-hydroxymitragynine row differently again.

Documentation

Carry the search record rather than a conclusion: for Mitragynine the sweep covered the Thai FDA narcotics table updated 15 September 2025 and the B.E. 2565 psychotropic notices, reached kratom as the nearest entry, rejected it as a different molecule, and stopped there. The reading was taken on 20 September 2026 from the consolidated narcotics table, read alongside the psychotropic naming notices, at https://narcotic.fda.moph.go.th/media.php?id=808160206197497856&name=NARCO+list+(update+15.09.2025)+NEW.pdf. No express open reuse licence was located on the cited page, so only the wording needed for verification is reproduced, with attribution and a direct link. The names and categories are set by ministerial notification, and the publications do not certify that no later notification exists, so re-read before relying on this.

Drug laws and enforcement change and vary within a country. This is not legal advice. Always confirm with Thailand’s embassy or official drug authority before traveling; penalties can be severe, including imprisonment.