MDMA acts as both a stimulant and psychedelic, producing an energizing effect, distortions in time and perception, and enhanced enjoyment of tactile experiences.
Adolescents and young adults use it to reduce inhibitions and to promote:
Euphoria, feelings of closeness, empathy, and sexuality
Although MDMA is known among users as ecstasy, researchers have determined that many ecstasy tablets contain not only MDMA but also a number of other drugs or drug combinations that can be harmful, such as:

Methamphetamine, ketamine, cocaine, cathinones, and caffeine
In addition, other drugs similar to MDMA, such as MDA or PMA, are often sold as ecstasy, which can lead to overdose and death when the user takes additional doses to obtain the desired effect.
MDMA is a synthetic chemical made in labs. Seized MDMA in the U.S. is primarily manufactured in, and smuggled across U.S. borders from, clandestine laboratories in Canada and, to a lesser extent, the Netherlands. A small number of MDMA clandestine laboratories have also been identified operating in the U.S.
What are common street names?
Common street names include:

Adam, Beans, Clarity, Disco Biscuit, E, Ecstasy, Eve, Go, Hug Drug, Lover’s Speed, MDMA, Peace, STP, X, and XTC
What does it look like?
MDMA is mainly distributed in tablet form. MDMA tablets are often sold with logos, creating brand names for users to seek out. The colorful pills are often hidden among colorful candies. MDMA is also distributed in capsules, powder, and liquid forms.
How is it abused?
MDMA use mainly involves swallowing tablets (50-150 mg), which are sometimes crushed and snorted, occasionally smoked, but rarely injected. MDMA is also available as a powder.
MDMA users usually take MDMA by “stacking” (taking three or more tablets at once) or by “piggy-backing” (taking a series of tablets over a short period of time). One trend among young adults is “candy flipping,” which is the co-abuse of MDMA and LSD.
MDMA is considered a “party drug.” As with many other drugs of abuse, MDMA is rarely used alone. It is common for users to mix MDMA with other substances, such as alcohol and marijuana.
What is its effect on the mind?
MDMA mainly affects brain cells that use the chemical serotonin to communicate with each other. Serotonin helps to regulate mood, aggression, sexual activity, sleep, and sensitivity to pain. Clinical studies suggest that MDMA may increase the risk of long-term, perhaps permanent, problems with memory and learning.
MDMA causes changes in perception, including euphoria and increased sensitivity to touch, energy, sensual and sexual arousal, need to be touched, and need for stimulation.

Some unwanted psychological effects include:
Confusion, anxiety, depression, paranoia, sleep problems, and drug craving
All these effects usually occur within 30 to 45 minutes of swallowing the drug and usually last 4 to 6 hours, but they may occur or last weeks after ingestion.

What is its effect on the body?
Users of MDMA experience many of the same effects and face many of the same risks as users of other stimulants such as cocaine and amphetamines. These include increased motor activity, alertness, heart rate, and blood pressure.
Some unwanted physical effects include:
Muscle tension, tremors, involuntary teeth clenching, muscle cramps, nausea, faintness, chills, sweating, and blurred vision
Severe dehydration can result from the combination of the drug’s effects and the crowded and hot conditions in which the drug is often taken.
Studies suggest chronic use of MDMA can produce damage to the serotonin system. It is ironic that a drug that is taken to increase pleasure may cause damage that reduces a person’s ability to feel pleasure.

What are its overdose effects?
In high doses, MDMA can interfere with the body’s ability to regulate temperature. On occasions, this can lead to a sharp increase in body temperature (hyperthermia), resulting in liver, kidney, and cardiovascular system failure, and death. Because MDMA can interfere with its own metabolism (that is, its breakdown within the body), potentially harmful levels can be reached by repeated drug use within short intervals.
Which drugs cause similar effects?
MDMA produces both amphetamine-like stimulation and mild mescaline-like hallucinations.