A Multi-Site Study of MDMA-Assisted Psychotherapy for Eating Disorders

Inclusion Criteria for Eating Disorder (ED) Participants: * Are 21 to 65 years old. * Are assigned female at birth. * Are fluent in speaking and reading the English language and can provide written informed consent. * Are able to swallow pills. * Agree to have study visits recorded to audio and video. * Are willing to include a consenting caregiver as a co-participant in elements of the study with whom the study team will have regular contact. This person must be willing and able to be reached by the investigators in case of emergency. * If connected to a psychotherapist at the time of recruitment into the study, participants may not change therapists, change the frequency of therapy, or commence any new type of therapy until after the Study Termination Visit, 1 month after the final Experimental Session. * Have an identified Primary Care Physician (PCP) and provide consent for the investigator to communicate with PCP, as needed. * If AN-R diagnosis, are currently participating in a recognized ED treatment program. * Are willing to sign a release for the investigators to communicate directly with their therapist, physician if relevant, as well treatment providers where they were currently or previously engaged an ED-specific episode of treatment. * Live within reasonable driving distance of the study site (equal to or less than an estimated 2-hour drive from the study site). * If of childbearing potential, must have a negative pregnancy test at study entry and prior to each …