“Molly” isn’t just a girl’s name anymore. It’s also a drug that despite its resurgence in popularity has nasty and, as two youths discovered last weekend at Electric Zoo (a large electronic music festival) in New York, deadly consequences. Six others were hospitalized with MDMA-related effects.

“Molly” is another name for 3,4-methylenedioxymethamphetamine or MDMA, the main psychoactive ingredient in Ecstasy. It is in powder or pill form, but unlike ecstasy from 20 years ago it is pure MDMA rather than cut with other substances. On the street it could sell at anywhere from $15-$50 a pop.

In the short term, “Molly” users experience a massive release of serotonin, a chemical in the brain that affects one’s mood. This massive release of serotonin also causes the release of oxytocin and vasopressin, which play roles in feelings of love, arousal, and others and cause some users to feel emphatic and close to others. There’s a catch. It also causes confusion, depression, sleep problems, anxiety and cravings that may occur soon or weeks after taking the drug.

“Molly” also causes spikes in heart rate and blood pressure, muscle tension, bruxism (grinding teeth), nausea, blurred vision, faintness, sweating or chills. It can also, depending on the dosage, interfere with one’s ability to regulate body temperature. According to the National Institute on Drug Abuse, it could lead to hyperthermia (a sharp spike in body temperature), which could kill in a number of ways, including liver, kidney or cardiovascular failure if untreated. It can also interfere with how the body breaks it down, meaning toxic levels of it could build up if taken repeatedly.

The last part reigns true for users, especially those who take another dose after the first starts to wear off.

The feelings of “love” could also lead to risky sexual behaviors, and sexually-transmitted diseases could result.

As of 1985, MDMA is a Schedule I substance under the Controlled Substances Act.

Despite it’s dangers and illegality, it has resurged. Rap artists like Tyga, Kanye West, Rick Ross and Trinidad James have glorified the drug in some of their songs. Even Miley Cyrus, who’s been nothing short of infamous since her Video Music Awards stunt, made allusions to the drug in her recent single, “We Can’t Stop”.

In a CNN report, a recovering alcohol, cocaine, and club drug addict said that “Molly” was by far the scariest drug he had tried, and that the drug could be lethal to those who’ve never tried it previously. A doctor concurred with the statement as to its lethality, especially if and when hyperthermia occurs in an already hot environment.

There have been lots of people who’ve been telling you to just say NO to doing drugs, and sometimes that practice alone has been dubiously effective. (For example, people drinking underage when they were taught in school to say NO, and know full well what it could do.) But this “Molly” is something you’ve got to say NO to.