Mephedrone 4-methylmethcathinone, Meph, meow, miaow-miaow, m-cat, plant food, drone, bubbles, kitty cat Mephedrone (4-methylmethcathinone) is a synthetic cathinone which is closely related chemically to amphetamines. It is a stimulant which was originally marketed as plant fertiliser. Related content Synthetic drugs Synthetic drugs are products containing chemical substances artificially developed to mimic the effects of illegal drugs like cannabis, cocaine and methamphetamine. Quick guide to drugs & alcohol An easy to read reference book with information on a range of drugs, drug effects, drugs and driving, pregnancy, treatment, statistics, drugs and the law and where to go for help and further information. Healthy Spirit Healthy Community – A guide to drugs and alcohol in our community An easy-to-read booklet with information on a range of drugs and their effects including: mixing drugs, pregnancy, the law, reducing the harm of drugs and where to go for help.