3,4-Methylenedioxymethamphetamine (also known as Ecstasy, XTC, MDMA, MD, Molly, and Mandy, among others) is a widely-used synthetic entactogenic substance of the amphetamine and phenethylamine chemical classes. It produces prototypical entactogenic effects such as anxiety relief, disinhibition, enhanced feelings of empathy, affection, and sociability, muscle relaxation, stimulation, and euphoria when administered.