Symptom-level antidepressant response to psilocybin: exploratory outcomes comparing psilocybin treatment to niacin Neuroscience Applied January 1, 2026 E. Lopez, J O Lundberg, F. Hieronymus et al. No Summary DOI: 10.1016/j.nsa.2026.106904 Psilocybin Antidepressant Niacin Mirtazapine +3