Modifies provisions relating to alternative therapies and treatments, including psilocybin

SB 1682 allows veterans and first responders aged 21+ with specific conditions (PTSD, major depression, substance use disorder, or end-of-life care needs) to legally use psilocybin for therapeutic purposes under strict conditions. It requires a doctor's certification, a trained facilitator present during use, lab testing of the substance, and limits to 150mg of psilocybin per month. The bill also allocates $2 million for research and shields healthcare providers from liability for following these rules. This is limited to therapeutic use only, not general legalization, and applies only to those enrolled in approved studies.