LSD is just one mind-altering substance in a category of drugs known as hallucinogens, which lead to persons to have hallucinations—factors that someone sees, hears or feels that appear to be genuine but are the truth is established from the brain. ” PCP (angel dust) was Employed in the 1950s https://medium.com/@LsdWorld/introduction-to-lsd-what-you-need-to-know-e70ffecb3a92