Psilocybin law in every state
Psilocybin law · MO
Is psilocybin legal in Missouri?
ProhibitedSchedule I federally
Psilocybin is illegal in Missouri: it is a Schedule I controlled substance under RSMo 195.017, possession is a class D felony, and the 2026 veterans psilocybin study bill died in the Senate.
Psilocybin is a controlled substance under state law with no programme for its use. Last checked 26 Oct 2026. Pending bills are re-checked weekly against the legislature; last change recorded 26 Oct 2026. Not legal advice.
Current status
- Psilocybin and psilocyn are listed in Schedule I, hallucinogenic substances, RSMo 195.017.2(5)(ll) and (mm) (Missouri Revisor of Statutes, current page)
- In 2026 the House passed HCS HBs 1717 & 1643 (137-11), which would have required a state study of psilocybin and ibogaine therapy for veterans and first responders; it was reported do pass by a Senate committee but placed on the Senate informal calendar on 7 May 2026 and did not pass before session ended. (Missouri House of Representatives, 7 May 2026; Missouri Independent via News Tribune, 5 Apr 2026)
Decriminalized cities and counties
None found as of 26 Oct 2026.
A local lowest-priority measure tells city or county police and prosecutors where to spend their time. It does not change state or federal law, and state or federal officers can still enforce it.
Bills
| Bill | What it would do | Status |
|---|---|---|
| HB 1717 (HCS HBs 1717 & 1643)2026 | Alternative TherapiesWould require a state-funded study of psilocybin and ibogaine therapy for veterans and first responders with PTSD, depression, substance use disorders or end-of-life needs, shielding enrolled participants from prosecution. | Passed House 2 April 2026; reported do pass in Senate, placed on informal calendar 7 May 2026; died at end of session (Missouri House of Representatives, 7 May 2026; Missouri Independent via News Tribune, 5 Apr 2026) |
| HB 8292025 | Alternative TherapiesEarlier version of the veterans psilocybin study bill. | Reported do pass by House committee; dropped from calendar 6 May 2025 (Missouri House of Representatives, 6 May 2025) |
Penalties
- Possessing any controlled substance other than 35 grams or less of marijuana is a class D felony (RSMo 579.015.2). (Missouri Revisor of Statutes, current page)
Federal law applies in Missouri too
- Peyote and mescaline are listed in Schedule I(c) of the Controlled Substances Act, as are psilocybin, psilocyn, DMT and ibogaine. (Legal Information Institute (Cornell) reproducing the U.S. Code, current)
- Outside the exemptions, distributing a Schedule I substance not named in the large-quantity tiers carries up to 20 years and a fine of up to $1,000,000 for an individual on a first offence (21 U.S.C. 841(b)(1)(C)); simple possession carries up to 1 year and a minimum fine of $1,000 on a first offence (21 U.S.C. 844(a)). (Legal Information Institute (Cornell) reproducing the U.S. Code, current; Legal Information Institute (Cornell) reproducing the U.S. Code, current)
Questions and answers
- Is psilocybin legal in Missouri?
- Psilocybin is illegal in Missouri: it is a Schedule I controlled substance under RSMo 195.017, possession is a class D felony, and the 2026 veterans psilocybin study bill died in the Senate.
- Has any city in Missouri decriminalized psilocybin?
- We found no city or county measure in Missouri that makes psilocybin a low enforcement priority, as of 26 Oct 2026.
- Are there psilocybin bills in Missouri?
- None is pending. Recent bills: HB 1717 (HCS HBs 1717 & 1643), Passed House 2 April 2026; reported do pass in Senate, placed on informal calendar 7 May 2026; died at end of session; HB 829, Reported do pass by House committee; dropped from calendar 6 May 2025.
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