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.

Michigan House Bill 4686, introduced on June 25, 2025, seeks to amend the state's Public Health Code to allow adults diagnosed with post-traumatic stress disorder (PTSD) to legally create, manufacture, possess, or use psilocybin and psilocin under certain circumstances. The bill was referred to the House Families and Veterans Committee for further consideration.

Supporters of HB4686 argue that psilocybin and psilocin have shown promise in treating PTSD, and legalizing their use for individuals with this diagnosis could provide a valuable therapeutic option. They believe this legislation could lead to improved mental health outcomes and offer relief to those suffering from PTSD.

Opponents of the bill express concerns about the potential risks associated with the use of psilocybin and psilocin, including safety issues and the possibility of misuse. They worry that legalizing these substances, even under specific circumstances, could lead to unintended consequences and pose challenges for law enforcement and public health.