In the UK, MDMA/Ecstasy are also known as E, pills, caps, pingers, M&M, doopa, love drug, disco biscuits, XTC, X and eccy. MDMA is also sold in the form of the hydrochloride salt, either as loose crystals or in gelcaps.
As the purity of the crystals is higher than ecstasy pills, users may often ingest similar measures of crystal MDMA which can potentially lead to overdose.
Many users take superman pills expecting to have the same high they’ve experienced with ecstasy. In fact, superman pills are commonly even labeled as ecstasy.