Michigan House Bill HB4686

Michigan 2025-2026 Regular Session

• Introduced: 6/25/25
• Refer: 6/25/25

Caption

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.

Summary

House Bill 4686 would amend Michigan’s Public Health Code to create a limited exemption from state controlled-substance prohibitions for psilocybin and psilocyn. Under the bill, an adult age 18 or older who has a medical record showing a diagnosis of post-traumatic stress disorder (PTSD) would not violate sections 7401, 7403, or 7404 by creating, manufacturing, possessing, or using a substance containing psilocybin or psilocyn, so long as the person possesses no more than 2 ounces and the substance is for personal use. The bill does not broadly legalize these substances; instead, it carves out a narrow defense or exemption tied to age, quantity, personal use, and documented PTSD. By adding section 7404a to the Public Health Code, it would modify how Michigan law applies to certain psilocybin- and psilocyn-related conduct and would limit criminal liability for qualifying individuals under the state’s controlled-substances framework.

Impact

HB 4686 would amend the Public Health Code by adding a new section that creates a PTSD-based exemption from certain controlled-substance offenses involving psilocybin and psilocyn. In practical terms, it would affect enforcement of Michigan’s drug laws by removing state penalties for qualifying adults who possess up to 2 ounces for personal use and can document a PTSD diagnosis, while leaving the underlying prohibitions in place for everyone else and for conduct outside the bill’s limits.

Sentiment

Based on the bill text and available context, the measure appears to be framed as a targeted medical or therapeutic exception rather than a general drug-policy change. No committee transcripts or recorded votes were provided, so there is no direct evidence of debate, support, or opposition in the available materials. The overall tone of the proposal suggests an intent to provide relief for individuals with PTSD while maintaining restrictions on broader possession and use.

Contention

The main points of potential contention are the use of psilocybin and psilocyn, the requirement of a documented PTSD diagnosis, and the bill’s narrow scope. Supporters would likely view the bill as a limited mental-health exception for adults with PTSD, while opponents could object to creating any legal pathway for possession or use of psychedelic substances, concerns about verification of medical records, or the possibility of broader drug-policy implications. The 2-ounce limit and personal-use restriction are also likely to be central to any discussion of whether the bill is sufficiently narrow.