MDMA or 3, 4-methylenedioxy-methamphetamine is a psychoactive substance, which is synthetically prepared to be sold as a recreational drug. In United States, MDMA is commonly known as Molly or Ecstasy. It is classified as Schedule 1 drug, which shows that it has no medically approved use and it carries a high potential for abuse and addiction. Ecstasy/MDMA has properties and actions similar to Amphetamine and Mescaline. The ingestion of MDMA results in an enhanced mood, euphoria, and altered perceptions. The drug acts as an agonist on TAAR-1 receptor and as an antagonist on VMAT-2 receptors. It causes an accumulation of dopamine, serotonin, and norepinephrine in the synaptic terminals. The use of MDMA is associated with hallucinations and permanent brain damage. It is important to clear the system of MDMA to avoid its deleterious effects by knowing how long does Ecstasy stays in your body or system.