What on earth is 3,4-DMMC?3,4-DMMC, often called 3,4-Dimethylmethcathinone, can be a synthetic stimulant belonging into the cathinone relatives. Cathinones are psychoactive substances which have effects much like amphetamines, and three,four-DMMC is no exception. It shares structural similarities with mephedrone (4-MMC), A different effectively-reg