A Double-blind, Placebo-controlled Study to Evaluate Very Low Dose LSD in Healthy Volunteers Aged 55-75 Years

Randomised, quadruple-blind, parallel-group study comparing three very-low-dose LSD regimens (5, 10, 20 µg) to placebo; dosing on Study Days 1, 5, 9, 13, 17 and 21 with a follow-up ~4 weeks after last dose.

Outcomes explored pharmacodynamic effects on cognition, affect, memory, temporal perception, executive function, learning, subjective effects, proprioception and balance, plus safety and tolerability measures.