
A study conducted by the US National Institute of Mental Health (NIMH) finds that LSD, mescaline, and psilocybin have similar qualitative effects. The also found the effects of psilocin and psilocybin to be shorter in duration and less potent than LSD or mescaline. The data also showed psilocin is about 1.4 times more potent than psilocybin. This is approximately the same ratio as their molecular weights (i.e., based on their molecular weights, they are equipotent).