What on earth is three,four-DMMC?three,4-DMMC, also called three,4-Dimethylmethcathinone, is usually a synthetic stimulant belonging to the cathinone household. Cathinones are psychoactive substances that have outcomes similar to amphetamines, and three,four-DMMC is no exception. It shares structural similarities with mephedrone (four-MMC), another