Yeah, um... mephedrone is a cat (cathinone). It's 4-methylmethcathinone (4-MMC). Cats are very similar to amphetamines structurally and are also strong uppers, but they have less popular effects. They don't really lend themselves well to focusing on a task. Too scattered of a stim for that, at least that's what they feel like for me.You will not be eating anybody's face off after taking it. You really have to ignore most of what the media says about drugs. Mephedrone and MDPV (also a cat) are not nearly as bad as they say. Although I hear there's truth to the severely bad side effects if you binge on MDPV. I've never wanted to, myself, so I wouldn't know.