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Because MDMA is illegal – and, therefore, unregulated – it is impossible to know what a "dose" contains. In fact, many drugs sold as "ecstasy" or "molly" are not MDMA. Get more MDMA facts.


To avoid fatal overdose, people who use heroin and other opiates, as well as their peers and loved ones, should be trained to administer naloxone, an overdose reversal drug. Get more heroin facts.


Marijuana is the most commonly used illegal drug, with forty-two percent of American adults reporting that they have used it. Get more marijuana facts.

Find more drug facts.