Psychological Effects of Methylenedioxymethamphetamine (MDMA) When Administered to Healthy Volunteers

Placebo in an equivalent weight to midomafetamine HCl will be administered in identical appearing capsules during one of two experimental sessions. An equivalent to the initial and supplemental dose will exist.

120 mg midomafetamine HCl will be administered in opaque capsules at the outside of one of two experimental sessions, and upon mutual agreement between the investigator and participant, 40 mg may be administered 1.5 to 2.5 hours later.