Good Golly Miss Molly

06.24.132:15 PM ET

New Drug Molly Hits New York

References to it appear in lyrics by Kanye, Miley, and more.

If you’ve heard a lot of references to “Molly” lately, it’s not because of a resurgence of the name—it’s a nickname for the pure form of MDMA, the ingredient that is combined with other substances that dilute Ecstasy and other drugs. People like Molly because it is not addicting, but doctors warn at the same time it can be physically harmful. Side effects can include teeth grinding, dehydration, anxiety, insomnia, fever, and loss of appetite. More troubling side effects are hyperthermia, uncontrollable seizures, high blood pressure and depression caused by a sudden drop in serotonin levels within days after usage, thus nicknamed “Suicide Tuesdays.” In the United States, the Drug Abuse Warning Network has reported that MDMA-related emergency visits have doubled since 2004. Molly is apparently big now because coke and weed are, according to one writer, grimy and smelly, respectively.