headache
headache was captured in 11 source papers (196/638). Interpret this as a source-backed named-event summary, not a head-to-head safety comparison.
ClinicalTrials.gov adverse events: Headache 33/50 (66%) in Psilocybin.
ClinicalTrials.gov adverse events: Headache 21/48 (43.8%) in Psilocybin.