Oklahoma (OK) — What’s Legal

Checked Oct 13 2025 • Parent-friendly summary (not legal advice).

Tianeptine: Schedule II — state added tianeptine to Schedule II (2022 summary confirms).
Phenibut: No explicit state schedule located (as of 2025); FDA classifies phenibut as not a lawful dietary ingredient.
Kratom: Legal (subject to regulation). No statewide ban found; listed as “N/A” in national summaries.
Nitrous oxide / inhalants: HB 1933 (2025 “Maddix Bias Act”) bans sale of N₂O to under 21 and use/possession for intoxication (misdemeanor up to 90 days or $5 000 fine; effective Nov 1 2025). General law (OK Stat § 63-465.20) already prohibits inhaling vapors for intoxication.
THC / Cannabis / Hemp THC: No clear statewide summary confirmed here; re-verify current medical/adult-use and hemp rules before posting.
Salvia / Salvinorin A: No explicit state listing or ban found.
Amanita muscaria / muscimol: No state scheduling found (as of 2025).
“Mad honey” (grayanotoxins): No OK-specific ban; falls under general food safety statutes.

Parent tip: Oklahoma now restricts nitrous oxide to 21+. Warn teens about inhalant and “booster” capsule risks — and report illegal sales to county health or police.