Project ARTICHOKE was the Central Intelligence Agency's secret code name for carrying out in-house and overseas experiments using LSD, hypnosis and total isolation as forms of physiological harassment for special interrogations on human subjects. At first agents used cocaine, marijuana, heroin, peyote and mescaline, but they increasingly saw LSD as the most promising drug. The subjects who left this project were fogged with amnesia, resulting in faulty and vague memories of the experience. In 1952, LSD was increasingly given to unknowing CIA agents to determine the drug's effects on unsuspecting people. One record states that an agent was kept on LSD for 77 days.