LSD could treat alcoholism because 'trips' make you reassess addiction A single dose of LSD produces benefits which last between six and 12 months, and repeated doses along with modern treatments could ensure longer term results, the researchers said. The drug, which causes hallucinations that make users experience the world in a distorted way, is not physically addictive but some experte believe users can become dependant on its effects, for example from a need to distance themselves from reality. Pål-Ørjan Johansen, a Norwegian researcher and fellow of Harvard Medical School, who led the research, said: "Given the evidence for a beneficial effect of LSD on alcoholism, it is puzzling why this treatment approach has been largely overlooked." Dr David Nutt, former advisor on drugs to the government, said: "I think this study is very interesting and it is a shame the last of these studies were done in the 1960s. I think these drugs might help people switch out of a mindset which is locked into addiction or depression and be a way of helping the brain switch back to where it should be, in a similar way that Alcoholics Anonymous programmes do.