MDMA is a stimulant with strong entactogen effects. Unlike regular stimulants, a key aspect of entactogens is their impact on emotions and their ability to enhance "inner awareness," which gives them a wide array of applications.
It's the most popular entactogen by far. MDMA has shown promise in psychotherapy, particularly in the treatment of PTSD, though it's most often used in recreational settings.
The substance is heavily associated with music events, but it's also taken at house parties, in small social gatherings, and with friends or partners.
Since the MDMA market is affected by adulterants, drug checking is vital.