If we are to believe the words of Timothy Leary, the verdict is that psychedelics are indeed beneficial to us humans.
The elite of American science, such as the National Institute of Mental Health (NIMH) and Harvard, have been conducting what is thought to be its first research into therapeutic uses of psychedelics (in this case, Ecstasy) since the university fired Timothy Leary in 1963. Why the sudden urge to pry open the doors of perception again considering the first time was not really a smashing success!
Dharmakaya 