Turn on, tune in, drop out. The rallying cry of the counterculture and hippie movement of the late 60s and early 70s, when LSD and other psychedelic drugs were perceived as being a shortcut to spiritual Nirvana and an essential tool in opening minds to new experiences. Research on the effects of psychedelics was in vogue, and for a time it was hoped that they would offer a panacea for many ills. Too many bad trips and the decline of the hippie culture saw the research quietly shelved and forgotten about. However, that is gradually changing and there seems to be a renewed interest in the medicinal effects of these drugs.