TUESDAY, June 13, 2023 (HealthDay News) -- Past-year use of non-lysergic acid diethylamide (LSD) hallucinogens was twice as high in 2021 as in 2018 among U.S. young adults, according to a study published online June 7 in Addiction. Katherine M. Keyes, Ph.D., M.P.H., from Columbia University in New York City, and Megan E. Patrick, Ph.D.,