Food Effects on Bioavailability of MDMA in Healthy Volunteers

Inclusion Criteria: * Are fluent in speaking and reading the predominantly used or recognized language of the study site. * Are able to swallow pills. * If of childbearing potential, must have a negative pregnancy test at study entry and prior to each Experimental Session, and must agree to use adequate birth control through 7 days after the last Experimental Session. Exclusion Criteria: * Are not able to give adequate informed consent. * Have uncontrolled hypertension. * Have a marked baseline prolongation of QT/QTc interval (e.g., repeated demonstration of a QTc interval \>450 milliseconds \[ms\] corrected by Bazett's formula). * Have a history of additional risk factors for Torsade de pointes (e.g., heart failure, hypokalemia, family history of Long QT Syndrome). * Have evidence or history of significant medical disorders. * Have symptomatic liver disease. * Have history of hyponatremia or hyperthermia. * Weigh less than 48 kilograms (kg). * Are pregnant or nursing, or are of childbearing potential and are not practicing an effective means of birth control. * Are abusing illegal drugs.