MSD Manual

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Methylenedioxymethamphetamine (MDMA)



Gerald F. O’Malley

, DO, Grand Strand Regional Medical Center;

Rika O’Malley

, MD, Albert Einstein Medical Center

Last full review/revision Jun 2020| Content last modified Jun 2020
Click here for the Professional Version

MDMA (3,4-methylenedioxymethamphetamine) is a drug similar to an amphetamine but has both stimulant and hallucinogenic effects.


MDMA causes excitement and disinhibition (a loosening of control over behaviors). It also accentuates physical sensation, empathy, and feelings of interpersonal closeness. Toxic effects are similar to those of the other amphetamines but are less common, perhaps because people are more likely to use MDMA intermittently. However, even with casual use, significant problems such as hyperthermia and hyponatremia (abnormally low levels of sodium in the blood) may occur. The effects of intermittent, occasional use are uncertain. Rarely, liver failure occurs.

Chronic, repeated use may cause problems similar to those of amphetamines, including dependence. Some users develop paranoid psychosis. Decline in mental functioning may also occur with repeated, frequent use.


  • Clinical evaluation

MDMA may not be detected by routine urine drug tests.


  • Symptomatic treatment for acute toxicities and dependency

Treatment for acute toxicity and dependency is similar to treatment for amphetamines, although treatment for acute overdose is less commonly needed.

More Information about MDMA

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
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