| Substance | Oklahoma | Federal |
|---|---|---|
| 7-OH (7-hydroxymitragynine) | not checked yet | pending: Temporary Placement of 7-Hydroxymitragynine Above a Specified Threshold in Schedule I |
| MGM-15 | not checked yet | Controlled substance (in effect since 2026-08-26) |
| Mitragynine pseudoindoxyl | not checked yet | Controlled substance (in effect since 2026-08-26) |
| Kratom (leaf and extracts) | not checked yet | Restricted |
| Nitrous oxide (whippets, tanks) | Restricted | Regulated; pending: H.R. 7945, Nitrous Oxide Safety Act of 2026 |
| Hemp THC and THCA | not checked yet | Regulated; pending: Public Law 119-103, division B, § 2019; restricted from 2026-12-11 |
| Tianeptine | not checked yet | pending: Schedules of Controlled Substances: Placement of Tianeptine in Schedule I |
| Phenibut | not checked yet | not checked yet |
| Poppers (alkyl nitrites) | not checked yet | Banned (in effect since 1991-02-27) |
| SR-17018 (5,6-dichloro desmethylchlorphine) | not checked yet | Controlled substance (in effect since 2026-08-27) |
The enrolled act states no effective date.
prohibiting the sale of nitrous oxide to persons under twenty-one
more than sixteen (16) grams of nitrous oxide commits a misdemeanor
Enrolled House Bill No. 1933, the Maddix Bias Act (63 O.S. § 465.22) Oklahoma Legislature
Our note: An age limit of 21 and a cap: possessing or selling more than 16 grams is a misdemeanor. Medical, dental, food-propellant, automotive, industrial and restaurant-supply uses are exempt.