Mephedrone, also known as 4-methylmethcathinone (4-MMC) or 4-methylephedrone, is a synthetic stimulant drug of the amphetamine and cathinone classes. Slang names include drone, M-CAT, and meow meow.
It is chemically similar to the cathinone compounds found in the khat plant of eastern Africa. It comes in the form of tablets or a powder, which users can swallow, snort or inject, producing similar effects to MDMA, amphetamines and cocaine. Despite similarities to known neurotoxins such as methamphetamine and cathinone derivatives, mephedrone does not appear to produce neurotoxic effects in the dopamine system of mice.