MDMA Assisted Therapy for BN

Inclusion Criteria: Participants will be included in the protocol if they meet the following criteria: * At least 18 years of age * Meet criteria for Bulimia Nervosa as measured by the EDA-5 * Able to provide written, informed consent * Able to swallow pills * Agree to have study visits recorded, including Experimental Sessions and non-medication therapy sessions * Provides a contact (relative, spouse, close friend or other support person) who is willing and able to be reached by the investigators in the event of a participant becoming suicidal or unreachable * Agrees to inform the investigators within 48 hours of any medical conditions and procedures * If able to become pregnant, must have a negative pregnancy test at study entry and prior to each Experimental Session, and must agree to use adequate contraceptive methods through 10 days after the last Experimental Session. Adequate contraceptive methods include intrauterine device (IUD), injected, implanted, intravaginal, or transdermal hormonal methods, abstinence, oral hormones plus a barrier contraception, vasectomized sole partner, or double barrier contraception. Two forms of contraception are required with any barrier method or oral hormones (i.e., condom plus diaphragm, condom or diaphragm plus spermicide, oral hormonal contraceptives plus spermicide or condom). 'Not able to become pregnant' is defined as permanent sterilization, postmenopausal, or assigned male at birth * Agrees to the lifestyle modifications * Liv…