Mephedrone (4-methylmethcathinone) is a synthetic ‘amphetamine-type stimulant’ (ATS) derived from the Khat plant and collectively known as ‘M-Cats’. Research has indicated the presence of strong displacement patterns in post-legislative timeframes with mephedrone incurred positive effects stimulating user preferences over amphetamine, MDMA and cocaine. The aim of this research was to...