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HB 4686

Crimes: controlled substances; creating, manufacturing, possessing, or using psilocybin or psilocin; allow under certain circumstances. Amends 1978 PA 368 (MCL 333.1101 - 333.25211) by adding sec. 7404a.

2025-2026 Regular Session Introduced by Kelly Breen and 6 co-sponsors

HB 4686 gives a PTSD-diagnosis defense for adults 18+ to possess, create, or use psilocybin/psilocyn up to 2 oz for personal use; requires medical record; prohibits sale.

bill electronically reproduced 06/25/2025
#crimes:controlledsubstances
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Bill Summary · HB 4686

HB 4686 (2025) – Summary

A Michigan House bill to amend the Public Health Code to create a limited defense related to psilocybin/psilocyn, requiring a PTSD diagnosis.

Purpose and intent

  • Create a limited exemption (defense) from criminal offenses related to creating, manufacturing, possessing, or using psilocyn or psilocybin under specified conditions.
  • Targeted for adults 18+, with PTSD, to facilitate personal-use possession of small amounts without violating certain provisions.

Key provisions

  • Adds new Sec. 7404a to 1978 Public Health Code (MCL 333.1101–333.25211).
  • Exemption structure comprises two parallel paths:
    • Psilocyn path (psilocyn defined as part of a substance containing psilocyn):
    • Must be 18+.
    • Possession limit: not more than 2 ounces.
    • For personal use only.
    • Must have a medical record demonstrating a PTSD diagnosis.
    • Psilocybin path (psilocybin-containing substance):
    • Must be 18+.
    • Possession limit: not more than 2 ounces.
    • For personal use only.
    • Must have a medical record demonstrating a PTSD diagnosis.
  • In both paths, meeting all criteria means the individual is not in violation of sections 7401, 7403, or 7404 (i.e., the relevant criminal offenses for controlled substances).

Scope and affected groups

  • Applies to individuals 18 years and older.
  • Requires a PTSD diagnosis documented in a medical record.
  • Limits possession to cannabis-like small quantities (2 ounces) and restricts use to personal use.
  • Affects defendants, law enforcement, and prosecutors by providing a legal defense if criteria are met; does not authorize distribution or sale.

Procedural and timeline notes

  • Introduced: March 12, 2025.
  • Final introduced version: June 25, 2025 (electronically reproduced); referred to Committee on Families and Veterans.
  • Earlier actions show a first-reading on April 3, 2025, with a separate committee referral (Culture, Recreation & Tourism) in addition to the later referrals (potential versioning differences).
  • Related companion bill: SB 1356.

Related and contextual considerations

  • The companion Senate bill indicates cross-chamber consideration and a broader, parallel discussion.
  • The bill does not create a regulatory framework for sale, manufacturing beyond personal-use defense, or medical licensing; it simply provides a legal defense under specific conditions.

Summary

HB 4686 would add a narrowly scoped defense to criminal penalties for possessing, creating, or using psilocybin/psilocyn, limited to adults with PTSD and up to 2 ounces for personal use. The change is confined to the specified sections of the Public Health Code and does not permit commercial distribution or non-personal possession. The bill is currently in Committee post-introduction, with a companion SB 1356 in the Senate.

Compiled from official sources — confirm details with the bill’s official record.

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