Between 1960 and 1973, 324 psychiatric patients at Frederiksberg Hospital in Denmark were treated with LSD or psilocybin, often in controlled, multi-session protocols. Of 151 patients with depression, 66% improved; among those with OCD or anxiety, over 50% reported relief. Some patients (about 6%) experienced worsening symptoms, including psychosis or agitation. Though the treatments were halted by 1974, the records offer rare, detailed insight into early psychedelic psychiatry.