LSD is only one brain-altering material in a class of drugs known as hallucinogens, which cause people to have hallucinations—items that someone sees, hears or feels that look like real but are actually produced because of the intellect. ” PCP (angel dust) was used in the 1950s as being a https://www.tumblr.com/lsdvibes/757469329295048704/historyoflsd?source=share