San Juan Capistrano

Researchers are studying the effects of CYB003, a deuterated psilocin analog, compared to a matching placebo as an additional treatment for adults with Major Depressive Disorder MDD. This Phase III study aims to evaluate the safety, tolerability, and effectiveness of two different doses of CYB003 alongside participants current antidepressant medications and psychological support. Participants will be randomly assigned to one of three groups one receiving 8 mg of CYB003, another receiving 16 mg of CYB003, or a placebo group. Each participant will undergo two dosing sessions about three weeks apart while continuing their usual antidepressant treatment and receiving manualized psychological support from a facilitator. Non-responders in the placebo group may have the chance to receive CYB003 in an extension trial. During the study, participants will complete several assessments including the Montgomery-Asberg Depression Scale MADRS, Beck Depression Inventory-II BDI-II, Clinical Global Impression Scale CGI-S, Generalized Anxiety Disorder 7-Item Scale GAD-7, and Quality of Life Enjoyment and Satisfaction Questionnaire Q-LES-Q-SF. These evaluations occur at multiple timepoints from screening through the end of the trial. Safety and tolerability will be closely monitored throughout the study, with the total duration lasting approximately 12 weeks from baseline to study end.

Researchers are evaluating the safety and effectiveness of TSND-201 in adults diagnosed with Post Traumatic Stress Disorder PTSD who have had symptoms for at least six months. The study involves participants who have previously tried at least one medication or trauma-focused psychotherapy for PTSD. This phase 3 randomized, double-blind, placebo-controlled trial aims to compare two doses of TSND-201 capsules with a placebo to better understand treatment options for PTSD. Participants will enter a 4-week Treatment Period during which they will be randomly assigned to receive either one of two doses of TSND-201 or a placebo capsule once a week, taken orally. After completing this treatment phase, they will continue into an 8-week Follow-up Period to monitor their progress and any changes in their condition. The study uses a parallel design and masking to keep participants and researchers unaware of group assignments. During the study, participants will undergo assessments including the Clinician-Administered PTSD Scale for DSM-5 CAPS-5 to measure changes in PTSD severity from the start through 12 weeks. Researchers will also monitor safety and efficacy by evaluating participants regularly through interviews and questionnaires. The entire participation duration covers 12 weeks, including treatment and follow-up, with safety and response being closely observed throughout.